Malicious PDF — malware analysis report

Static analysis result for SHA-256 da4e79fab9739b37…

MALICIOUS

PDF

42.8 KB Created: 2020-08-30 02:54:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0b976a779833072676809e34cf7f18 SHA-1: 4bc6d19265110a989ab45d568808ba7d8f12fa2a SHA-256: da4e79fab9739b3734a2d5ad38b587b9e5f4680b84815f8a6b88498610f5872f
152 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Marvel alliance 2 cheats ps3' and the malicious URL, suggesting a lure to a scam or phishing page. The presence of numerous other links hosted on Shopify, while benign, are part of a link farm strategy to improve SEO for the malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/wix?keyword=marvel+alliance+2+cheats+ps3
    • https://cdn.shopify.com/s/files/1/0428/8312/1319/files/94552048315.pdf
    • https://cdn.shopify.com/s/files/1/0431/6528/6566/files/dejegafosujijumab.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/double_multiplication_facts_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/3469/8147/files/12748222241.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/que_es_el_genero_indie.pdf
    • https://cdn.shopify.com/s/files/1/0432/0939/2285/files/minoduwurogolovuvimoripum.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9871/files/picture_clues_worksheets_for_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0430/7940/1623/files/68963852773.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006942.bin
2d6232de07aded29dc56d226a1e3cf254dd608ce51e037a76d3e7cfba72694f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6942 5384 bytes
font_01_sfnt_off00007b91.bin
87560c9c43d51f7e2936d52794d2492872fd4a6791feba6a5166a9581e88837a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B91 10376 bytes

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