Malicious PDF — malware analysis report

Static analysis result for SHA-256 852abc24ae3f8936…

MALICIOUS

PDF

50.6 KB Created: 2020-09-08 11:09:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 993f186fde27d28e620c316b41aa0275 SHA-1: 06086eff864492b5e2c2bdb4ec73ac6ef54c5c2e SHA-256: 852abc24ae3f893652718139d5dd46339544b52c86c0fb4fc15a37bfc3c35950
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a link to a known malicious redirector infrastructure, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains text fragments that appear to be lures for market value guidelines, suggesting a phishing or scam attempt. The presence of numerous other PDF links, as flagged by PDF_SEO_LINK_FARM, further indicates a link farm or spamming operation.

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.link/pify?keyword=market+value+guidelines+andhra+pradesh
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/scientific_journal_article_critique_example.pdf
    • https://cdn.shopify.com/s/files/1/0463/3500/0737/files/lajezegojog.pdf
    • https://cdn.shopify.com/s/files/1/0432/3491/8568/files/28555254334.pdf
    • https://static.usrfiles.com/ugd/e1d58f_8335615c6a164932928ad96a0b935219.pdf
    • https://static.usrfiles.com/ugd/55f640_b598399f31f5428f82b8dfee64e66694.pdf
    • https://static.usrfiles.com/ugd/9c43ec_3bb3c650178b4e63a271bf65106dfdd8.pdf
    • https://static.usrfiles.com/ugd/3c2969_4d4529d01c2642b59250f8d017c6ee40.pdf
    • https://static.usrfiles.com/ugd/ca32a8_9ec47a9286414ea69f3570414304bb0d.pdf
    • https://static.usrfiles.com/ugd/7ef0dc_8beae5b6f2a6404da966047bdea9bb3c.pdf
    • https://static.usrfiles.com/ugd/c63dba_750ed80af9444b13b6507f24498da1dd.pdf
    • https://cdn.shopify.com/s/files/1/0439/1161/0536/files/english_animals_movie.pdf
    • https://cdn.shopify.com/s/files/1/0464/5968/2984/files/activity_sheets_letter_b.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000670d.bin
e7575ef0f27b92007d13b11b7730be279457a85b0e4e2a13f2dac570ee5aff0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x670D 5352 bytes
font_01_sfnt_off0000794e.bin
58dd1892c29cc299b0afa1640093441125045d8116031d1863263130f0057875
pdf-font-stream PDF embedded font (sfnt) at offset 0x794E 14236 bytes
font_02_sfnt_off0000a670.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
pdf-font-stream PDF embedded font (sfnt) at offset 0xA670 16164 bytes