Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6ee866276f59048…

MALICIOUS

PDF

47.7 KB Created: 2020-08-21 22:01:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3c199a06a3f29adbb64b4405aa76b3d7 SHA-1: e79ac060e10a38bd61133377345363d8939134e6 SHA-256: a6ee866276f59048f94921a904a73f8ca4bb31fd6628b42c6b9a7d9931a33c73
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious due to a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic fired, revealing a large number of external links within the document. The primary malicious IOC is the redirector URL, which is likely used to funnel users to further malicious content. The document body contains obfuscated text and embedded URLs, reinforcing the malicious nature.

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.ru/pify?keyword=html+template+golang+variable In PDF document text
    • http://files.bittersweetapothecary.com/uploads/1/3/1/1/131163540/650071.pdfIn PDF document text
    • http://files.wctcca.com/uploads/1/3/2/6/132681579/ad7409e5c1b512c.pdfIn PDF document text
    • http://vopobuvel.hilltophero.org/uploads/1/3/2/6/132695471/06e89331.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8641/files/16352235763.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9426/8320/files/48516500262.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2216/1832/files/lawozezinikisob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/jeteroxada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0075/7398/files/ropaveredu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8367/7339/files/rozabatomulu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9246/7109/files/be_being_been_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/concierto_de_aranjuez_trompeta.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4745/0774/files/47729911504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/academic_year_calendar_2020_20.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4923/8178/files/bavufevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5197/3799/files/football_clubs_logo_quiz_level_1_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/sesame_street_sesame_sings_karaoke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3768/7962/files/bezusodudixomebekogez.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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7001 5124 bytes
SHA-256: 6bc33fc773f7259cb3855ddde02b043fc38275d551d0bebe5ab9d7f176c7ee95
font_01_sfnt_off00008150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8150 15428 bytes
SHA-256: e05c0d97ff7bbd5c7f2684e12564e6631a8fda6e736bc880f590474b93ba7331

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