Malicious PDF — malware analysis report

Static analysis result for SHA-256 055640d2ef0cf3ff…

MALICIOUS

PDF

43.1 KB Created: 2020-08-20 19:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d300c650e8c5c8fe8ff9641547bd3804 SHA-1: 4c99f8e5d2ceccb5e524229d7027d18ad8942254 SHA-256: 055640d2ef0cf3ffc3b4fbd127e3cad94767aa360e4c19e40682e03b2e9e77d9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes a URL that appears to be a lure for a user guide, suggesting a phishing or malware distribution attempt. The presence of a link farm and a malicious redirector strongly indicates an intent to lead the user to a harmful destination.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=hp+laserjet+pro+mfp+m125a+user+guide
    • http://files.abodeinteriordesigns.co.uk/uploads/1/3/1/4/131455247/7fa4c7d.pdf
    • http://gisajoluv.janestraveladventures.com/uploads/1/3/1/4/131406082/6d6bbfd1c.pdf
    • http://files.conquestgamesite.com/uploads/1/3/0/9/130969089/fafekurukur.pdf
    • http://files.centralfloridabirth.com/uploads/1/3/1/4/131453256/lemunijepoxevogaxum.pdf
    • http://dulikidi.gentlestrengthbotanicals.com/uploads/1/3/0/9/130969596/binox.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/24810932871.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/xerenorizererururalix.pdf
    • https://cdn.shopify.com/s/files/1/0439/1455/9656/files/60872506762.pdf
    • https://cdn.shopify.com/s/files/1/0434/4827/1000/files/15937250280.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/18410569865.pdf
    • https://cdn.shopify.com/s/files/1/0429/2519/5427/files/riesgos_laborales.pdf
    • https://cdn.shopify.com/s/files/1/0435/2720/9120/files/gakafanesefevavonuta.pdf
    • https://cdn.shopify.com/s/files/1/0434/6930/8061/files/breakfast_at_tiffany_s_ebook.pdf
    • https://cdn.shopify.com/s/files/1/0439/1917/9931/files/24212627542.pdf
    • https://cdn.shopify.com/s/files/1/0462/4174/2997/files/10376892134.pdf
    • https://cdn.shopify.com/s/files/1/0438/3745/6534/files/84589203294.pdf
    • https://cdn.shopify.com/s/files/1/0432/1034/2559/files/mikoxodixonufaxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000691c.bin
5e8753c12e29d7ad6157bb2c5cd0ffc61c6eed9ea79eb7f206a808cacd577bfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x691C 5704 bytes
font_01_sfnt_off00007c77.bin
63abdd5bf75856eb7a4a31cb7377629e0cc8b9f56d8dcceb76ad4f67ff102e82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C77 10236 bytes

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