Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a6c4628bc49ff48…

MALICIOUS

PDF

56.8 KB Created: 2020-08-18 23:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a58ca4409e1aa67586ab30248da55863 SHA-1: b123a8c1d6a722e80c8dd703024cf95290ace25a SHA-256: 8a6c4628bc49ff4836852762ba8f50f5be7201e86790dd96bd104cb9ad88f0d5
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link pointing to a URL that includes 'medicare+safety+net+refund+form', suggesting a phishing lure. It also features a large number of embedded PDF links, many hosted on Shopify, likely for SEO manipulation or to obscure the final malicious destination. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the phishing attempt.

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.ru/pify?keyword=medicare+safety+net+refund+form In PDF document text
    • http://files.shopacr.org/uploads/1/3/1/8/131856276/jiriposeviri.pdfIn PDF document text
    • http://lebovu.mcwoodturnings.com/uploads/1/3/1/3/131380550/9233931.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/1/0429/4819/8556/files/93153926668.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5283/4711/files/rirasomibabuboto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/17498235629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9374/5046/files/17655307828.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9098/3574/files/avast_mobile_security_premium_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/94711161573.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4015/1454/files/sobujofipajubetolenup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6785/0390/files/viwuweretevokamexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4634/5640/files/pezipekuzis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0023/3112/files/8054440511.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 3

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_off0000a048.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA048 5244 bytes
SHA-256: 7a1cdab8714dd673e1e448d24d4bc47695cec056f687ac6632e280d3a0afcb51
font_01_sfnt_off0000b20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB20A 10556 bytes
SHA-256: 7b089fd57e05a2a4efdd0db8c2ef4817bb71565b77d69d8f3f2b061a799ec10b

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