Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1bdfa133c006d7a…

MALICIOUS

PDF

49.5 KB Created: 2020-07-20 11:26:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: a77629e7ed11f2f4b145b0271f630c28 SHA-1: 4fa3334d58317a08d16dd3695d867616c34a166a SHA-256: a1bdfa133c006d7a695a4350f7ee70c0d5be1bed00df1bf1eeaad4190bbedfc8
194 Risk Score

Malware Insights

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

The PDF was flagged for containing a large number of external links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of numerous links suggests a link farm or redirection strategy to lead users to malicious content. The primary attack vector appears to be social engineering through deceptive links.

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=analysing+consumer+markets+pdf In PDF document text
    • http://files.tesorinoeq.com/uploads/1/3/0/7/130740262/jejimewebuxakibura.pdfIn PDF document text
    • http://files.samanthajeankosakowski.com/uploads/1/3/1/3/131384127/4038239.pdfIn PDF document text
    • http://files.portlandrnsa.org/uploads/1/3/0/7/130775261/a3e3e2b2320.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/1/0433/0687/7080/files/13336488851.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51982080438.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxolalinurijelibabozafod.pdfIn PDF document text
    • https://lepezepeti.files.wordpress.com/2020/07/162155366.pdfIn PDF document text
    • https://wapulegumun.files.wordpress.com/2020/07/wegawuligevubuziso.pdfIn PDF document text
    • https://vedededegi.files.wordpress.com/2020/07/rufoxenoxupup.pdfIn PDF document text
    • https://pozetis.files.wordpress.com/2020/07/rowunidivopatijatumavubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1161/2578/files/7365271410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/lawokikilizakibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2567/9015/files/govazilir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xamunodobesezuwenetubaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/naxijejipelugaxikaki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3942/4669/files/34603115190.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_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 5512 bytes
SHA-256: 2c86a38e5160ace61f771c187269287f6bb72a4b6289254c75250448f0ea2beb
font_01_sfnt_off00009539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9539 10416 bytes
SHA-256: 98ec7d1bc068dcb7d4c8b0f21a7c58c29b1305b46516ca38c23c366ab83520e4

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