Malicious PDF — malware analysis report

Static analysis result for SHA-256 18015dda945adace…

MALICIOUS

PDF

40.4 KB Created: 2020-08-01 11:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e6bba9e209e30e042c6ab05b9c5f565 SHA-1: 28e634f8d4e80f24c481394689850fd34b2d5528 SHA-256: 18015dda945adacedccea0209b9466ee0cd3f75505caa2ec7f8d0c85d3d49055
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.cc/pify?keyword=write+image+to+sd+card+mac'. The document body, though heavily obfuscated, contains the same URL, indicating the primary intent is to redirect users to malicious content. No scripts were extracted, but the presence of numerous links and the redirector heuristic strongly suggest a phishing or malicious redirection attack.

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=write+image+to+sd+card+mac
    • http://files.inspirationsbyamielee.com/uploads/1/3/0/7/130774968/devazulajojidazitat.pdf
    • http://files.naturallypsyphyproducts.com/uploads/1/3/0/7/130775704/xatag.pdf
    • http://files.haydenflooringservices.co.uk/uploads/1/3/0/7/130776481/5815333.pdf
    • http://files.threelittlepigsbath.com/uploads/1/3/2/6/132695805/ac5439ab275e7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/gitovogeduguviv.pdf
    • https://cdn.shopify.com/s/files/1/0436/6349/1222/files/84194861596.pdf
    • https://cdn.shopify.com/s/files/1/0431/7259/3832/files/81439364758.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/dililewobubararedezeli.pdf
    • https://cdn.shopify.com/s/files/1/0433/2139/3320/files/poxadezaziredumiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/10460107108.pdf
    • https://cdn.shopify.com/s/files/1/0433/9954/4984/files/20758480546.pdf
    • https://cdn.shopify.com/s/files/1/0432/4855/0050/files/96210168868.pdf
    • https://cdn.shopify.com/s/files/1/0440/5913/2056/files/5944413541.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/65233410578.pdf
    • https://cdn.shopify.com/s/files/1/0434/0151/1077/files/nivopifux.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_off00006072.bin
d7dd13d3b493a22551370d219e21d38c7a549a88b1bc33edfceb9c00abb8fc09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6072 5240 bytes
font_01_sfnt_off00007235.bin
5cc1d89fab825466fb0d18baf9ffb6b66b6241c07485fb9cfe8a35887379a935		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7235 10156 bytes

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