Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e0871b817694c0a…

MALICIOUS

PDF

46.2 KB Created: 2020-09-01 01:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5facbdca2a59d3f3e1f0955b006401b5 SHA-1: 7e49f1c5c0320516489a3cf47ff0f0204da12050 SHA-256: 0e0871b817694c0a332231f7baa323aa46c2d00728a64142ec94eb8b23f80139
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wix?keyword=time+limit+for+filing+tax+audit+report', suggesting a phishing or redirection attempt. The presence of numerous other PDF links further indicates a link farm, a common tactic for SEO poisoning or distributing 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.cc/wix?keyword=time+limit+for+filing+tax+audit+report
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0449/4196/7528/files/lodonebojatawogedasozosag.pdf
    • https://cdn.shopify.com/s/files/1/0438/6488/3355/files/1537428691.pdf
    • https://cdn.shopify.com/s/files/1/0459/9218/1919/files/toveturuzizupizenol.pdf
    • https://static.usrfiles.com/ugd/c12414_ba19060d5afe44c187bf49dd16209bb0.pdf
    • https://static.usrfiles.com/ugd/d01287_de81dc430d07408d8550bfa5ca48afa4.pdf
    • https://static.usrfiles.com/ugd/b6edda_4038fab8730746859ddfea6014018e07.pdf
    • https://cdn.shopify.com/s/files/1/0457/9970/2694/files/79194347914.pdf
    • https://cdn.shopify.com/s/files/1/0429/2083/7279/files/vewafawu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3345/0903/files/blender_eevee_transparent_node.pdf
    • https://cdn.shopify.com/s/files/1/0437/6972/5080/files/22105727770.pdf
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/design_agency_company_profile.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_98124cccbca147c58485dc4d7dc3a6a6.pdf
    • https://static.usrfiles.com/ugd/1a89c8_188aeb0e02e14f8ebbecac08b2fbb5e5.pdf
    • https://static.usrfiles.com/ugd/b444d4_056302f2dbfa4ac0a11677886dea6d7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_41d9c33729344538840855d96bbe4326.pdf
    • https://static.usrfiles.com/ugd/96768c_f1dfcd94a65b4522ab6219f5c9b88add.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_off00007611.bin
e67ece25848c76661b646486135292193cddff53ccbca33c52af2b1dfd75809e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7611 5200 bytes
font_01_sfnt_off000087b4.bin
146ba4cde44cfd0fd7fca8f1c3b968d077daeed16e38e74d3e1b12d90f232bb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87B4 10580 bytes

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