Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b9964cbfd7805e…

MALICIOUS

PDF

41.6 KB Created: 2020-08-19 18:06:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4c986d62e8c8e1337793ed8fa2ef52d8 SHA-1: 6e93aa91cae7225debee595d81f0a9cb14eeabd5 SHA-256: a9b9964cbfd7805e15c68a60368c0c1dd96edc9584db6d3e34008132e99bc34b
194 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'English introduce yourself worksheet' and the malicious URL, suggesting a social engineering lure. The presence of numerous PDF links indicates a link farm strategy, likely to obscure the malicious redirector and improve SEO for malicious content.

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=english+introduce+yourself+worksheet In PDF document text
    • http://bimerazuk.ambercoveshoreexcursion.com/uploads/1/3/0/9/130969140/sazilirufasuwa.pdfIn PDF document text
    • http://files.thunderboltgermanshepherds.com/uploads/1/3/0/9/130969061/888354.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/1/0434/7111/0308/files/58400235093.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7005/3784/files/college_algebra_sullivan_6th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9110/7752/files/kenofadudolimirogidumazid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5042/6780/files/fall_foliage_report_western_north_carolina.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3459/0888/files/fikujodipezatilinawo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3363/2661/files/66992576890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8187/5112/files/femoral_hernia_repair.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/60199860094.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4785/5004/files/260045749.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1855/9393/files/rozodugifigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9642/4096/files/faux_leather_sheets_for_bows_canada.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5813/4168/files/arithmetic_functions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5561/2058/files/reading_numbers_in_english_exercises.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6954/7431/files/15094469467.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 1

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_off0000647d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x647D 5288 bytes
SHA-256: 316044859072add23b862a880b26672d093d5a58a7e88a97e62f93a85c195564
font_01_sfnt_off0000768b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x768B 10120 bytes
SHA-256: 407815e99fe25861d6213e813d26264a9d10458758f5f451f7dbbd98817c68d4

Open this report in the interactive analyzer, or submit your own file for analysis.