Malicious PDF — malware analysis report

Static analysis result for SHA-256 40db263685d7b4fd…

MALICIOUS

PDF

100.3 KB Created: 2020-08-12 02:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 94043139034278ee6602f9cc33fb4c9e SHA-1: 034a1239db277a3d238665219531a5b1182637c6 SHA-256: 40db263685d7b4fdff4d8a76e58e9ba61050983f840015f7118f5e0769522739
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a significant number of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identifies a link to a known malicious redirector, ttraff.com, which is presented in the document body as a link to 'models of language acquisition pdf'. This indicates the primary purpose is likely to redirect users to malicious content or phishing sites. No scripts were extracted from this sample.

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=models+of+language+acquisition+pdf In PDF document text
    • http://files.staceyjanedouglas.com/uploads/1/3/0/7/130738622/83f01a6.pdfIn PDF document text
    • http://jonaluw.thorbournebaby.com/uploads/1/3/0/8/130813846/jotonejetuvepurila.pdfIn PDF document text
    • http://files.moveptwellness.com/uploads/1/3/1/0/131070230/7054b241d7.pdfIn PDF document text
    • http://files.kashmirgoldens.com/uploads/1/3/2/6/132681796/216e2722680ba8.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/1/0428/4763/3575/files/xeburuzofebulip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/11092408122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9501/4056/files/vulegovulisisuzubopok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9922/6279/files/96658965456.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9261/5073/files/belgaum_district_map.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3613/7882/files/complex_sentence_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4763/3575/files/lidizuvafevalatov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7600/1704/files/cambio_climatico_efectos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/cambium_epmp_1000_datasheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/7432/6438/files/antihistaminicos_h1_mecanismo_de_accion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6562/0118/files/nasidaluborepipupem.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_off00014004.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14004 5240 bytes
SHA-256: 579212bcc8ecabc2244ae67c9dbcea29381bf57029bf5931ae8c139d3d8a1d29
font_01_sfnt_off000151ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151EC 10308 bytes
SHA-256: 29da2d57a9bdf05982e35d3e9743c321568d425f7bb641ac740e5ba341476c73
font_02_sfnt_off0001754a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1754A 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34