Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e9d7e746c346aca…

MALICIOUS

PDF

46.9 KB Created: 2020-08-06 17:05:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d32b65b49cda7cdbd2f2a00f8e1bae8d SHA-1: 8dfa13daa90a71dbb6f71b1268dc743577e9852c SHA-256: 0e9d7e746c346aca3f4b26e749cef1403430f2b8669cfa9dd1b538c6dea304c8
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for search engine optimization, further supported by the PDF_SEO_LINK_FARM heuristic. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be a phishing attempt via a malicious link embedded within the document.

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=basketball+court+dimensions+in+feet+pdf
    • http://files.shsbballtipoffclub.org/uploads/1/3/0/7/130775429/xozawadulolol_pedivoz_livije.pdf
    • http://files.londonhalleditions.com/uploads/1/3/1/1/131163872/nalod.pdf
    • http://files.designyoursignregina.com/uploads/1/3/0/7/130776401/3551107.pdf
    • http://files.misfitcrusaders.com/uploads/1/3/0/8/130814672/634f8e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/gerazudikeduzosumar.pdf
    • https://cdn.shopify.com/s/files/1/0441/0392/5912/files/89471515467.pdf
    • https://cdn.shopify.com/s/files/1/0434/5066/3062/files/88374157395.pdf
    • https://cdn.shopify.com/s/files/1/0440/5103/8358/files/intentional_living_john_maxwell_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0594/1672/files/85997335989.pdf
    • https://cdn.shopify.com/s/files/1/0429/6074/8695/files/bupomabamavukivajib.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/torenoduzopopiwu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vemuvuferakodumi.pdf
    • https://cdn.shopify.com/s/files/1/0436/0519/6957/files/zasirowapiwuguni.pdf
    • https://cdn.shopify.com/s/files/1/0434/3683/4968/files/43948597805.pdf
    • https://cdn.shopify.com/s/files/1/0429/2873/4367/files/87731962372.pdf
    • https://cdn.shopify.com/s/files/1/0430/7678/0192/files/best_psychology_books_on_human_behavior_in_urdu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b3a.bin
a52e9fb01afc687bf446b2ecf1fc93f2f885377cdd46d0fedfcc12ee3add5004		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B3A 5436 bytes
font_01_sfnt_off00007d8d.bin
358c2dc0f028ccbceaa5066f72e2a7f909d4d41aa87dfe51c752abc44daf4882		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D8D 10032 bytes
font_02_sfnt_off00009fe2.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FE2 4324 bytes

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