Malicious PDF — malware analysis report

Static analysis result for SHA-256 defbaf091ed1de94…

MALICIOUS

PDF

58.5 KB Created: 2020-08-17 10:37:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c1ef8ebe2a386d6ee006cedf059d4b66 SHA-1: 8aca1efc30b11a371d26ab7202acb6aa47967b45 SHA-256: defbaf091ed1de9418731323a287cabfbc623a565b0f2120f8ab576c7d300fea
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged this PDF with high confidence. The document body appears to be a mix of garbage data and embedded URLs, suggesting an attempt to disguise the malicious intent. The primary attack pattern involves luring the user to click on malicious links, potentially for phishing or to download further malware.

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=bootstrap+website+templates+github In PDF document text
    • http://files.lacaladesign.com/uploads/1/3/1/4/131437775/podifinelozoja-nojukuroz.pdfIn PDF document text
    • http://files.fairlie.school.nz/uploads/1/3/1/1/131164075/xevog-katabokog-tonosusibaxenom-lalilaweruxunar.pdfIn PDF document text
    • http://gidoke.krsmithphotography.com/uploads/1/3/1/4/131407552/7715b8fe1249ad7.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/1/0448/0181/8781/files/bijesomefax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8648/7455/files/star_wars_rouge_squadron_cheats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/9882/8954/files/wwe_enterence_music.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8553/7175/files/60162013677.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4560/0936/files/72955493595.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7103/6822/files/balun_balun_dj_song.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6246/8503/files/27500585851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4016/2467/files/59312880025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1249/7313/files/13578847969.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/abbyy_transformer_plus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5271/9515/files/31462097970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3502/3770/files/63584771835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4845/0718/files/female_body_language_book.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_off000073dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x73DD 6588 bytes
SHA-256: fa72874b8c381873b432d3b5cea9ecddba20f04e8e1c9face7d560df1136061a
font_01_sfnt_off00008457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8457 5292 bytes
SHA-256: 5318b8435b8070ddb40e256a11a68d566195b9296b93f4b85fec3687d91aa1f9
font_02_sfnt_off00009668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9668 10060 bytes
SHA-256: cde60e19f76028f84b94abb16e63b3cb736cb6d72ade357f867e2e35784ce793
font_03_sfnt_off0000b919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB919 16168 bytes
SHA-256: 252a907607fe8cf2d36f1e9c44c1986127e79ee03ae35aaafcaf9f4d1a976959
font_04_sfnt_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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