Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0c81a64ab994336…

MALICIOUS

PDF

55.9 KB Created: 2020-08-11 07:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fb99cea93f453a0708847276e130db8c SHA-1: e2bf6e8fa50077af4949400b771b0ef3084eadf8 SHA-256: d0c81a64ab994336beae9beed09e7f7dbc8bcddb3eabff1c0f4d7fed1dd0b56c
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by a PDF link farm heuristic. The primary malicious URL, 'https://ttraff.cc/pify?keyword=problem+solving+strategies+pdf', is embedded within the document and likely serves as the initial lure. The document body, though heavily obfuscated, contains references to this URL and other Shopify-hosted PDFs, suggesting a campaign to distribute malicious content disguised as legitimate documents.

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.cc/pify?keyword=problem+solving+strategies+pdf In PDF document text
    • http://files.skillscout.com/uploads/1/3/1/6/131607544/8873428.pdfIn PDF document text
    • http://files.susannahnix.com/uploads/1/3/0/9/130969306/sadegazulobedup.pdfIn PDF document text
    • http://files.cradkilodney.com/uploads/1/3/1/4/131437402/buzanativubezad-nosup-kanulib.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/1/0431/3081/4626/files/gumawenarig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9567/0432/files/85356159906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4722/2422/files/kopagixowefurimevufor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7079/9510/files/zazederutuzenejupi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9785/7954/files/koraxafexa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/leriwepomuniletedajawev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/kegotarerufazudemami.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/anisio_teixeira_biografia.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 4

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_off00009dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DD8 5560 bytes
SHA-256: a3ead627675f379922a17202f20e3befe4b809b0637621db05a6153bf4119370
font_01_sfnt_off0000b0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A8 10088 bytes
SHA-256: b5a8e930ac0898af0b695b0d1bfac6bf9dca99de2bc81aabe698bc440bb4ecb6

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