Malicious PDF — malware analysis report

Static analysis result for SHA-256 1423bd7b13297b77…

MALICIOUS

PDF

51.5 KB Created: 2020-08-28 03:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1de3c7e135b9e755d433ee92ff43b5d SHA-1: c804a6585ff6a5cb2ff06f8303a18880ecb264d7 SHA-256: 1423bd7b13297b77810cb6cc684f74f04e341961a3befa9765fbe88bdb06b197
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is presented as a song download. This indicates a phishing or malware distribution attempt. The document also contains a large number of links to other PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly suggest a phishing or malware delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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/pify?keyword=ninne+chudanu+pommantu+mp3+song+download
    • http://files.baptistegerbier.com/uploads/1/3/1/1/131163859/rojuserota-fitemujan-govapulogopu.pdf
    • http://files.premierprescotthomes.com/uploads/1/3/0/7/130739987/8964067.pdf
    • http://files.naamarosedance.com/uploads/1/3/2/3/132302888/9291576.pdf
    • http://files.lifewithsqueaky.com/uploads/1/3/1/4/131454986/7902783.pdf
    • http://files.orchidvitality.org/uploads/1/3/1/6/131606803/sevalejikowir.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://fedorahosted.org/lohit
    • https://cdn.shopify.com/s/files/1/0433/4721/4486/files/biredakilulur.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/kopunalojini.pdf
    • https://cdn.shopify.com/s/files/1/0429/6641/7571/files/nuxuboleziwakalaxu.pdf
    • https://cdn.shopify.com/s/files/1/0436/2931/4206/files/sobaxorevipupeweseduju.pdf
    • https://cdn.shopify.com/s/files/1/0433/5570/1398/files/bofajusenekuderebafitemi.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/bosch_security_keypad_manual.pdf
    • https://cdn.shopify.com/s/files/1/0439/1682/0635/files/nobivutedilej.pdf
    • https://cdn.shopify.com/s/files/1/0438/2657/7570/files/radaduf.pdf
    • https://cdn.shopify.com/s/files/1/0439/9369/4366/files/back_pain_home_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0437/9197/4549/files/yes_please_amy_poehler.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/viborovikumowenaben.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b5f.bin
1156d2cbf3a8470ddfcde9705bf31d835e06f472492849378e7f3c8a39e2bfb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B5F 5616 bytes
font_01_sfnt_off00006e5d.bin
6e977072f1d888db3708955d85ea4206c2c601381ee21675d6e0be523354e0af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E5D 4084 bytes
font_02_sfnt_off00007da9.bin
07ecde503da4517b8f20e35e4c6cab051d84b79abe310f3c2ada97187e7d04e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DA9 1852 bytes
font_03_sfnt_off0000869b.bin
5fcc40c9a50c7dcfb42f5475d8f4cc6d3934c603adb35417e417f097593cb4f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x869B 10472 bytes
font_04_sfnt_off0000aabe.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAABE 16164 bytes

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