Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac378f2648bbed4a…

MALICIOUS

PDF

45.3 KB Created: 2020-08-22 01:44:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce6b4fa8528fd85030057d23f6f276ea SHA-1: 05ec17d3fcf6a61af0239ed2569716ae42ac8eab SHA-256: ac378f2648bbed4aeca001a4029354521aa6c67f47465e1db50f16dd43c2ec30
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious infrastructure. The presence of a large number of external PDF links, many hosted on Shopify, indicates a link farm designed to attract traffic.

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=picada+de+formiga+inchaco In PDF document text
    • http://siweb.carolmeadsart.com/uploads/1/3/1/4/131453960/40bac6d1884291b.pdfIn PDF document text
    • http://webed.moodyplumbinginc.com/uploads/1/3/1/4/131438044/3458667.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/1/0432/8433/2710/files/how_to_dual_box_wow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/jipizow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/64241618534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3332/9815/files/totemusaxixagemoxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/0325/2636/files/smash_mouth_all_star_mp4.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8257/8088/files/german_language_learning_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5930/5877/files/42752798216.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0716/5095/files/sumizedudexodikej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5667/7543/files/senior_accountant_interview_questions_and_answers.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 8

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_off00005f66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F66 5228 bytes
SHA-256: a93b9f7a8fe137388358e17cc2b06f52ce4908fc4b0cfcff39aa0f71fdf9919d
font_01_sfnt_off000070f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F6 10008 bytes
SHA-256: f8689f3e8faf7733c7b1a2f9a1db7a2819b1a39ccfd08eea9359bc099600dc71
font_02_sfnt_off00009349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9349 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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