Malicious PDF — malware analysis report

Static analysis result for SHA-256 df20ea4972f00a27…

MALICIOUS

PDF

50.2 KB Created: 2020-08-06 13:47:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2540fc78627947105bf8e314298ceb7e SHA-1: 6c1bdc9b00db6397427f96d170e1b14856190fa4 SHA-256: df20ea4972f00a2710c4fc86eeacb5e182b59975d6c493af06aa507e0e7fff18
214 Risk Score

Malware Insights

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

The PDF contains a mass of external links, including a redirector to 'ttraff.cc', suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/pify?keyword=abnormal+psychology+pdf+9th', indicating a lure to download a PDF related to abnormal psychology. The presence of numerous Shopify-hosted PDF links further supports the link farm heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=abnormal+psychology+pdf+9th In PDF document text
    • http://jigilu.jasontabit.com/uploads/1/3/0/8/130814328/tilapetuj.pdfIn PDF document text
    • http://files.bestoftimeswatch.com/uploads/1/3/1/3/131379749/e4facd24be.pdfIn PDF document text
    • http://files.srinivasan.co.uk/uploads/1/3/1/3/131379540/bc6a3cb5a456.pdfIn PDF document text
    • http://files.jessicageoff.com/uploads/1/3/1/4/131454492/9f82ebe.pdfIn PDF document text
    • http://files.familiarstrangers.info/uploads/1/3/0/7/130775707/fipaka-feworidewerot-jojaguzufenan-nuloropetu.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/1/0428/9835/8432/files/bodadajigewodozisidezufe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0355/8564/files/employee_write_up_form.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6579/4965/files/dorefetavemogad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42386580717.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/zigovekew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6436/1113/files/5724012988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2122/8440/files/addict_with_a_pen_piano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/8360/0806/files/anarcho_syndicalism.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5162/2306/files/59265577169.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/diablo_3_cheats_xbox_one.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/pigedaxowazisuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8640/4000/files/wasorukagumazubapubufutum.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_off000080d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80D1 5956 bytes
SHA-256: aef6696bc91864bd7294d16f313bf9cafc4ab60dc3ef0e35108b0f1000418ce4
font_01_sfnt_off000094ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94EC 10968 bytes
SHA-256: df10d687673869abf6d0c3b33383b45e1b3ece0655f69d722426e45fea3cb371