Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a7cd9a3ecc8afb0…

MALICIOUS

PDF

44.1 KB Created: 2020-08-07 20:28:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 90db6768ce1c9739aee539a1bd128a01 SHA-1: 7a7e9d055f789e4528e1d9fd1091bf491c3b7550 SHA-256: 9a7cd9a3ecc8afb0eb7f77cdecdf844137bde19cf1ed9cbde62a986a729be2c3
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'alphabetical series reasoning questions pdf' and the malicious URL. This suggests a phishing or social engineering attempt to redirect the user to malicious content. No scripts were extracted, limiting the analysis of further stages.

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=alphabetical+series+reasoning+questions+pdf In PDF document text
    • http://files.buildhealthyseniors.com/uploads/1/3/0/8/130813988/67c91d4d2.pdfIn PDF document text
    • http://files.drfaridyounos.com/uploads/1/3/0/7/130740177/dudobewobajogirej.pdfIn PDF document text
    • http://files.newdundeefireworks.com/uploads/1/3/1/8/131858481/vivosovipisojened.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/1/0428/5107/4214/files/76467134504.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5026/1911/files/vigepekimurut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9122/1923/files/18288130851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9648/9632/files/tederebinemizaxufilo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1188/9562/files/tamigolo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0258/5500/files/rizivajabefevekosaxijolu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0581/2629/files/gosopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0595/9574/files/20458424294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1094/8254/files/3088518741.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lomapatigusobotatijizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.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 8

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_off0000679e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679E 5672 bytes
SHA-256: 0f2421fe87bbb980706ec1ec04b35cdb57a8ef8228e5b209159c2ea4a24077ba
font_01_sfnt_off00007acb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ACB 12872 bytes
SHA-256: 75663528fd55cb51ac4546b4b04d851fccfd23ea7ab578907c2d19b254dd3dcd

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