Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bcf786d43913e56…

MALICIOUS

PDF

62.6 KB Created: 2020-08-25 17:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: eeccee89952608defbef1a1b2c7f529f SHA-1: 909edb5055526656b85f13249ddddb347e009cd4 SHA-256: 7bcf786d43913e5677239154ae0cef9d3af888d57ecd850a6ca89c93c170acfe
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to a redirector service (ttraff.com) that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and several benign-looking Shopify links, suggesting a lure for free downloads. The ML classifier also strongly indicated maliciousness.

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.com/pify?keyword=information+bottleneck+theory+of+deep+neural+networks In PDF document text
    • http://files.houseofnonie.com/uploads/1/3/0/9/130969446/nabagixug.pdfIn PDF document text
    • http://puwaxud.malaykaneith.com/uploads/1/3/0/8/130814328/73247e1.pdfIn PDF document text
    • http://linesawe.freechristianebooks.org/uploads/1/3/1/3/131398360/navawotiliwas_zimitulemoxu_mudinaribazupe_logev.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/1/0427/3229/0215/files/62149840029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6015/7855/files/lejavanefaluke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6580/2905/files/46026143222.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4445/4051/files/xodidatelizukat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8443/2031/files/97849020958.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/ford_2000_tractor_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8236/6629/files/5752760376.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5528/4378/files/tovutimifurikes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3496/8213/files/28977502745.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8305/4757/files/git_drop_changes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5222/1091/files/77972192285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/jaruwuxasom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7701/6483/files/xobitanukedonekufelul.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000092cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92CD 5732 bytes
SHA-256: e24028070ea18ffb51ec99c8be09ed468280f4f17a162df6b908e4ef28969799
font_01_sfnt_off0000a625.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA625 15808 bytes
SHA-256: 7b7478eb06a54cd00f77a6ff2a93db1a6df177c60cfe28d231953766be2fe519
font_02_sfnt_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 16088 bytes
SHA-256: 9c057ac09ec7e90559246466cf17d5e2b4b033cefee822b4d3dac6bf26bbb550

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