Malicious PDF — malware analysis report

Static analysis result for SHA-256 75640d4935dd1f53…

MALICIOUS

PDF

47.4 KB Created: 2020-08-18 14:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cb75c564cc7201b0de483303e993edf4 SHA-1: e0c572b6291cbc01ce7207ccadc715301d92bf8e SHA-256: 75640d4935dd1f533f1625ec3bc55e17b3e9d8855dc0f778762b1c2d15fd0b0f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded links, many of which point to a redirector service (ttraff.com) known for malicious activity. The document body itself contains the same lure text and URLs, suggesting an attempt to trick users into visiting these sites. 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=bible+commentary+telugu+pdf In PDF document text
    • http://ruradoned.msmbnyc.com/uploads/1/3/0/9/130969060/moravabex_nutudenidexupe_subiwi.pdfIn PDF document text
    • http://posut.reshootarchery.com/uploads/1/3/0/8/130874493/fafikumupo_punujap_xosevawozukabe.pdfIn PDF document text
    • http://files.gwhsgroundscommittee.com/uploads/1/3/0/7/130739267/2649506.pdfIn PDF document text
    • http://files.thecaruca.com/uploads/1/3/0/7/130775337/6f12e46fb.pdfIn PDF document text
    • http://rudenofed.harlanhawkband.org/uploads/1/3/1/4/131483083/4312361.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3358/4028/files/zovogafesejixutodafasiniw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8212/9320/files/wazagaroxupekuzofisudaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1102/2756/files/steam_activities_for_middle_school.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9312/1442/files/hormonal_regulation_of_carbohydrate_metabolism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2341/8019/files/modern_automotive_technology_6th_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3550/9415/files/kimisini.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/infinite_stratos_ova.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8771/4721/files/15262335052.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5082/6919/files/easton_arrow_spine_chart.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9360/6046/files/28473309701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/93705890760.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5269 5472 bytes
SHA-256: e9ae40df48d1dfc2505f0092aaa83a3feb13c94bdbbddaa4335c7dc4dacb8812
font_01_sfnt_off000064e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64E4 3296 bytes
SHA-256: 44983ba33b49fa29cb1beb0f3bb26442c7b59f91b0f8a2f9ae2cf796fb0bb43f
font_02_sfnt_off000072ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72AC 15368 bytes
SHA-256: ea2f63983c6dbd7e14f106b8632fa36d26d1747f55d266da3877126633da69a6
font_03_sfnt_off0000a218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA218 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f