Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cb7a67541ddd1d0…

MALICIOUS

PDF

40.7 KB Created: 2020-08-27 22:12:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bc1f77b564e341687012e148a7d4b878 SHA-1: b617f4731bff0405909d72f02e53c4c57e7a0544 SHA-256: 4cb7a67541ddd1d04b0c5c51fb36890eeca496601dd0317dcf84b671250711d7
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though partially corrupted, includes the title 'Primary vs secondary deviance' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier strongly flagged this PDF as malicious, and the presence of a redirector link indicates a likely attempt to lead the user to a harmful destination.

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=primary+vs+secondary+deviance In PDF document text
    • http://kepuput.culinaryvacationsinc.com/uploads/1/3/1/6/131606782/sulefujadirinin.pdfIn PDF document text
    • http://files.gracechristianmusicfestival.com/uploads/1/3/1/8/131871583/namazokuselina_xigunubagizuka_fijitujabibasit_gaboponobowabul.pdfIn PDF document text
    • http://files.nintaiinvestments.net/uploads/1/3/1/4/131437119/951492.pdfIn PDF document text
    • http://files.starlightmessages.com/uploads/1/3/2/7/132740870/a26651a.pdfIn PDF document text
    • http://files.youandmesparkle.com/uploads/1/3/2/7/132740949/987667.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/1/0431/3802/3592/files/vexukixas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1400/0540/files/phylum_brachiopoda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2133/4690/files/penekavetu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8270/9160/files/bloomberg_lp_annual_report_2016.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6176/3480/files/jojusifolujirekenidom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/aquelarre_mega.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3179/7668/files/sozixumulavurazizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2643/8550/files/legion_td_2_builds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1560/2337/files/kifafilufosofuxiwad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2666/6904/files/42782272542.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2548/1379/files/designspark_magazine.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9959/4656/files/91744507676.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/poxupabafomojubaxim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6399 5216 bytes
SHA-256: 80ecf55425056b5104239899ae1ace3c2e640bf14858a4232666136052b8cce1
font_01_sfnt_off00007537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7537 9592 bytes
SHA-256: f6ee0decb7620de41f73a48a245a55efd16fcc58a29da31f7302277aad12a179