Malicious PDF — malware analysis report

Static analysis result for SHA-256 62028fa9b5a6bfc5…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 06:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0a9b1b43e0496b67ca49e3a8cb8506b SHA-1: 323ec2f6f0b8885b18d67b02bf7b11ec95f8dedc SHA-256: 62028fa9b5a6bfc58e19105960780f45cae3f4394bce1911cbf3896311b445db
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains a URL that matches the redirector heuristic, suggesting an attempt to lead the user to malicious content. No scripts were extracted, but the presence of numerous links indicates a likely phishing or malware distribution attempt.

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.com/pify?keyword=applied+science+and+technology+index+pdf
    • http://vagup.michiganeliterealty.com/uploads/1/3/1/4/131406665/farolabozomon-mobavebufir-suzema.pdf
    • http://files.soulsurvivorsband.com/uploads/1/3/0/9/130969545/befokosuwaloxew_sarazizug_vanokewoweziwag.pdf
    • http://weban.stepintoyourjoy.com/uploads/1/3/1/6/131607163/6d486.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/1460/9303/files/48923847758.pdf
    • https://cdn.shopify.com/s/files/1/0434/8136/6693/files/91736474329.pdf
    • https://cdn.shopify.com/s/files/1/0431/2806/2109/files/mechanics_of_materials_6th_edition_beer.pdf
    • https://cdn.shopify.com/s/files/1/0431/2737/3986/files/jiwexizanusejeti.pdf
    • https://cdn.shopify.com/s/files/1/0437/4138/0759/files/ficha_hemerografica_definicion.pdf
    • https://cdn.shopify.com/s/files/1/0430/3932/6365/files/dediwe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0434/2264/6422/files/31497983044.pdf
    • https://cdn.shopify.com/s/files/1/0441/3983/9640/files/94693410827.pdf
    • https://cdn.shopify.com/s/files/1/0427/8065/5775/files/97389627505.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_off000067ac.bin
49683420b6c8954b18f370664e7dfa951b696bacaeedca0e5448ff3307caa875
pdf-font-stream PDF embedded font (sfnt) at offset 0x67AC 5480 bytes
font_01_sfnt_off00007a55.bin
55311c2e436f1dbd0bfa938b1e553e9c020e57a99ad14f26379771e940595703
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A55 10624 bytes