Malicious PDF — malware analysis report

Static analysis result for SHA-256 a640d84d8036d4a9…

MALICIOUS

PDF

42.7 KB Created: 2020-08-08 04:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6a8401013f55920b7c15571b6115634f SHA-1: d2626b91fc2e46c9ee58796578d4c2758b5a9e1c SHA-256: a640d84d8036d4a9ee439605b23177da6375e7387841b4898a38859fa5c7af5b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as a search result for boiler information. The document also contains a large number of external PDF links, many hosted on cdn.shopify.com, suggesting a link farm or SEO poisoning attempt. No scripts were extracted, but the primary malicious activity appears to be redirecting the user to a harmful site.

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.cc/pify?keyword=worcester+greenstar+24i+system+boiler+pdf In PDF document text
    • http://gobovusi.patrickrheck.com/uploads/1/3/1/4/131438142/xovazodawo_rimurizigozewa_sijigopure.pdfIn PDF document text
    • http://files.boudoirsbyian.com/uploads/1/3/1/6/131607093/zesizufovafoxut_bulom_dosojodabel.pdfIn PDF document text
    • http://files.christinehenseler.com/uploads/1/3/1/0/131070560/4154151.pdfIn PDF document text
    • http://files.sweethavenlavender.com/uploads/1/3/1/6/131637850/gusigebuliz_bexiwipobifi.pdfIn PDF document text
    • http://files.62squadron.com/uploads/1/3/1/3/131384145/3308639.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/1/0431/7950/7872/files/genapujoxuzelemudid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/80295055286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1335/8247/files/xefegonorujuguke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9301/6232/files/46353422985.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4273/4237/files/48419669300.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0319/1193/files/50447162473.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/3670/0835/files/work_rules_laszlo_bock_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1901/7124/files/18709867641.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2871/6439/files/24863824616.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/4550/6459/files/deep_learning_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0175/6323/files/tewusaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2155/8183/files/digital_image_processing_gonzalez_3rd_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/eileen_wellstone_snopes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4145/5254/files/33470352805.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59B2 5740 bytes
SHA-256: e5f105699b9bb8fc74057db2863d9c5c7b53bd1e429b95c7b073109b8c42f7dc
font_01_sfnt_off00006d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D37 10056 bytes
SHA-256: 5b8711dbb9b4c090957a13ad126b9cd569f0383cc5c16b80cb7f95e8800ce743
font_02_sfnt_off00008f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F65 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378