Malicious PDF — malware analysis report

Static analysis result for SHA-256 481639430cc2ff63…

MALICIOUS

PDF

40.5 KB Created: 2020-08-20 22:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 124cbaf4868c0bd53b0d7a0018ce11bb SHA-1: c78ad5ab30dc6990fb0231e0200d7353fc33ef4f SHA-256: 481639430cc2ff6382a0f49346420c723eba345d6113b0d2da6d4c90201418ea
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK and the ML classifier strongly indicate malicious intent. The document body, though heavily obfuscated, contains a URL that appears to be part of the lure. The presence of a link farm suggests an attempt to distribute content or traffic, potentially for phishing or malware delivery.

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=poweredge+fx2%252F+fx2s+cmc+user%25E2%2580%2599+s+guide In PDF document text
    • http://files.herblowe.com/uploads/1/3/1/3/131398517/tenebumola.pdfIn PDF document text
    • http://files.charlestontransplanthome.org/uploads/1/3/0/7/130739686/gunanaximemop-ziperewatuni.pdfIn PDF document text
    • http://files.rockymountainliteraryfestival.org/uploads/1/3/0/7/130739919/golozivaduz-jirubodogofi-pezupoj.pdfIn PDF document text
    • http://files.fortworthdst.org/uploads/1/3/2/6/132696351/3a1e179f32.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/1/0432/6565/4939/files/mobexe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9517/8902/files/guniva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43181801848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8410/2297/files/alfabeto_e_numeros_em_ingles.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5535/7858/files/pukaxapigebojasaxitufozud.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/felobujulufesigifokas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0868/7269/files/gafekudexiwikebu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2182/0319/files/tixonukibulifukoroluka.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/buzitanipemawisas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9665/4499/files/lega_serie_b_calendario.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/blue_planet_2_episode_7.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_off00005e75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E75 5480 bytes
SHA-256: ac0d168065ee6a0539d8c534dd8afc23696226483615f964946e956614945673
font_01_sfnt_off00007133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7133 9872 bytes
SHA-256: a90b6d5feeab9e7db61f570408c6464527564d8b57cfe187b894ea0eba3b4c66

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