Malicious PDF — malware analysis report

Static analysis result for SHA-256 6344919995aa7ec8…

MALICIOUS

PDF

41.4 KB Created: 2020-08-28 08:07:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 89f6402d94840ffdf5485b2539e58d0f SHA-1: c5917a63f2a5c2c590ae96be3f6098c5f1bb0f81 SHA-256: 6344919995aa7ec85ca19a48aa1d4f23fe840d03d0ec431ab1b964aff7eb8583
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to redirector domains, specifically identified as a malicious redirector and an SEO link farm. The document body, though heavily obfuscated, contains URLs that point to these redirector services. This indicates an attempt to direct users to malicious content or phishing sites.

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=kerlinger+f+1988+investigaci%25C3%25B3n+del+c In PDF document text
    • http://kojifure.graylineconvention.com/uploads/1/3/0/9/130969858/poniboj_xasajuwa.pdfIn PDF document text
    • http://files.millvalleychickens.com/uploads/1/3/0/7/130739340/5180252.pdfIn PDF document text
    • http://files.loganshappyrocks.com/uploads/1/3/1/4/131406735/tepujaguz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5330/8314/files/fs_14_apk_indir_android_oyun_club.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/95491009207.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0874/3834/files/car_salesman_training_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/53532987561.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/49501043281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7632/9373/files/defugijumovemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4017/8333/files/how_to_compress_file.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7720/6178/files/libros_sobre_aprendizaje_cooperativo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5883/9203/files/kobamavuwuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6382/0959/files/kometimopoxesoriruga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/85450973079.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 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BAE 5436 bytes
SHA-256: 7578c565586e45324bf828821e0880417be24f5e84a3b22753baa5f401ab7a38
font_01_sfnt_off00005e3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3E 13744 bytes
SHA-256: 550228d800374f7acc0e1a938840535f7c7312ae9879a67df8e9d108bae04e59
font_02_sfnt_off00008868.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8868 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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