Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8b5df19d38196d…

MALICIOUS

PDF

43.0 KB Created: 2020-08-20 20:23:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 17511a4022e3074ab16f90912efc352d SHA-1: 476416b2f6eff531ebb47aca2845b95d9225dadc SHA-256: 4f8b5df19d38196de24a29ce9702e0379ef9f913983672d22c85ec2b405ca3b2
202 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.ru/pify?keyword=reference+works+homeopathic+software+free'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are hosted on Shopify. The document body, though heavily obfuscated, also contains the malicious URL. The presence of a download button lure further supports a malicious intent, likely to redirect users to a phishing page or download further malware.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=reference+works+homeopathic+software+free In PDF document text
    • http://files.moreministries.info/uploads/1/3/1/8/131856163/621be9d19e3b.pdfIn PDF document text
    • http://tefof.buttercupbakerymb.com/uploads/1/3/1/4/131406202/rosivome_ginekabadasevog.pdfIn PDF document text
    • http://files.bobdgorman.net/uploads/1/3/1/4/131452838/1b38a2a7d18d.pdfIn PDF document text
    • http://dopiri.castlebargreenhomes.com/uploads/1/3/0/7/130776499/8316495.pdfIn PDF document text
    • http://files.lesherosfourbus.com/uploads/1/3/0/8/130813796/loxezuluj_rufegiluli_jifipejofiropu_jefoxurire.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/1/0433/4272/5275/files/15291881232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/jajogeriruj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9390/0958/files/referencias_bibliograficas_apa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9044/4445/files/tazakugigirivaziset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2627/6775/files/brief_cognitive_assessment_tool_for_schizophrenia_b_cats.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8648/7456/files/12687087308.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9149/9935/files/blanqueamiento_dental_interno.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4230/8250/files/alchemy_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3638/5181/files/broadcast_journalism_andrew_boyd.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A23 5388 bytes
SHA-256: c996a8b2b488158401e97cf5db07a4028e79f0871c59f160b2b8ec093c62e997
font_01_sfnt_off00007c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C5B 10148 bytes
SHA-256: e6dd1ddda985bd5bde254e9cdd35e6fc3439e64d436549e84dfc26f5a699b4c6

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