Malicious PDF — malware analysis report

Static analysis result for SHA-256 994e85f7d4effc40…

MALICIOUS

PDF

55.4 KB Created: 2020-08-04 07:14:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d38ba8340d16e9558821ba09af7a0fa SHA-1: 08fbfb632a3d491483a96440c8176e1701214f55 SHA-256: 994e85f7d4effc4066412806360e9806b2d26ea7cf42691a6710f175ded703f1
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=s%25C5%2582ownik+obrazkowy+angielski+pdf+chomikuj'. This indicates the document is designed to lure users to a potentially harmful website. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning attempt to improve search engine ranking for malicious content. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=s%25C5%2582ownik+obrazkowy+angielski+pdf+chomikuj In PDF document text
    • http://files.soccercolony.com/uploads/1/3/1/3/131379060/lukufezevafino.pdfIn PDF document text
    • http://files.rscareersupport.org/uploads/1/3/0/7/130740596/7266244.pdfIn PDF document text
    • http://files.useyourbodywell.co.uk/uploads/1/3/1/3/131380889/pojotepa-benubiru-dijeker.pdfIn PDF document text
    • http://files.oldmanfreakboy.com/uploads/1/3/0/7/130776416/buwuwazoniwekik.pdfIn PDF document text
    • http://files.truegritwithgrace.com/uploads/1/3/1/3/131384636/loruwedupi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0923/6374/files/83574604562.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8819/9328/files/jasifexuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/rune_scribe_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1216/1685/files/create_folders_mac_terminal.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6051/7271/files/revised_standard_version_catholic_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0445/6418/5247/files/4_main_branches_of_philosophy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5845/3928/files/30692972732.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3452/5352/files/86782448153.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6200/0806/files/salen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0085/5706/files/47452958143.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5937/2439/files/59127088549.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FCD 6440 bytes
SHA-256: 629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e
font_01_sfnt_off00006fc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FC1 6056 bytes
SHA-256: e954a1408db9ef7020114509216c548cb0d210731ba8a60ef1c4e0d2d5dd9b4f
font_02_sfnt_off00008445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8445 11892 bytes
SHA-256: 40710182788a3ed9ca76d1e2819f7b64581b7c32a1842cdaf6e0792afd4c856d
font_03_sfnt_off0000aaa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAAA8 16040 bytes
SHA-256: 8647281a3c744fc6d0b53cd0b4129fbf868dc80d788fe83738ada4fefb377b5a
font_04_sfnt_off0000bf28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF28 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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