Malicious PDF — malware analysis report

Static analysis result for SHA-256 69c04032b867cf81…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 00:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10bb611ad405a22cc8786dfa82c7c5fa SHA-1: 5596f773130b1077c346d0dcbd4756a04b86cba0 SHA-256: 69c04032b867cf81ba107025c195f49de055c7091ad779a10928f3963cfb9917
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking Shopify URLs, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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.ru/wix?keyword=actinometry+in+photochemistry
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7221/5448/files/47621722512.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/timunufuziduzazunasoget.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/3172527076.pdf
    • https://cdn.shopify.com/s/files/1/0431/7744/3483/files/70118969983.pdf
    • https://cdn.shopify.com/s/files/1/0427/3097/9495/files/gali_chirugali_dj_song_naa.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/public_autopsy_reports_florida.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/widizosatadusuzovasovodas.pdf
    • https://cdn.shopify.com/s/files/1/0428/6165/8279/files/14161779409.pdf
    • https://static.usrfiles.com/ugd/b8c837_1bb2aa7339834f3a8358bd9568f5b3e9.pdf
    • https://static.usrfiles.com/ugd/b8c837_5e8e1677c4d24c3b96da265f62ba50d6.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_off00006cf4.bin
b19661cabd1f8f8bb097f0645069c17c255e1e7436fe9e356d98da884d392a4f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CF4 5020 bytes
font_01_sfnt_off00007ddc.bin
eae2360c3e36f7d12d3445970018b87fcd3c459bd365bb7b54c8f3a2ec918a29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDC 10620 bytes

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