Malicious PDF — malware analysis report

Static analysis result for SHA-256 05135fa31df380b9…

MALICIOUS

PDF

64.7 KB Created: 2020-09-01 05:26:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0e710626fb3eacc2a36fac36364dfed SHA-1: f03c77dab664f161d3916870cfdb4777cb19ca13 SHA-256: 05135fa31df380b9ff6fe4a16feab0a94fef494b2c6a20e018465e4cf1387785
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains the same URL, suggesting a lure to a malicious site. The presence of numerous external PDF links, many benign, indicates a potential SEO poisoning or link farm tactic to distribute the malicious URL.

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.com/wix?keyword=altium+designer+tutorial+for+beginners+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://static.usrfiles.com/ugd/6d59ab_3df534aea9b64e0aa67cbaefe1a60ba3.pdf
    • https://static.usrfiles.com/ugd/b8c837_edd33d551f4f421bb0b5ca9025c349b7.pdf
    • https://static.usrfiles.com/ugd/58a813_bbaff8a1c6e946fba780de4a85a7c50b.pdf
    • https://static.usrfiles.com/ugd/8cbfce_dad1c84800ea437a88b8893af306e2b7.pdf
    • https://static.usrfiles.com/ugd/de02f3_d1186ff7f0cd4dc584d7cad7127bb9b1.pdf
    • https://static.usrfiles.com/ugd/b8c837_eea4112683c54a28bbe9606a482bf2ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_a5b6b2e2ebab4cee956829f534e28626.pdf
    • https://static.usrfiles.com/ugd/bae363_4a9aea2ba04c4e11beb6cb36f974bc93.pdf
    • https://static.usrfiles.com/ugd/913720_4f41ad5f6e7845ecb3d455eea1ec58e7.pdf
    • https://static.usrfiles.com/ugd/c8d394_85365a9a8646430ca5bce7f60640842b.pdf
    • https://cdn.shopify.com/s/files/1/0435/6240/1947/files/jakekabamofavomefawazadi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/33374625424.pdf
    • https://cdn.shopify.com/s/files/1/0431/7279/0427/files/74101783042.pdf
    • https://cdn.shopify.com/s/files/1/0431/8425/9231/files/gufesafodelutevamatifobav.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b0d8.bin
b8a42f97408b3fc743224ebc0b4818711d57d9119246d56604c7354d67651a06		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB0D8 5372 bytes
font_01_sfnt_off0000c2f8.bin
67a141f618e01cf04426e226379f96ea7dd027d7d205e617750f564ef156fe4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2F8 10720 bytes
font_02_sfnt_off0000e74f.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE74F 4324 bytes

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