Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d39541fccd30299…

MALICIOUS

PDF

41.2 KB Created: 2020-08-01 12:22:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 820db5033989dd0e5a08e4c59aa5ee0c SHA-1: 48e3403d10ba1804f30b6de3930adf7ef5c3a22e SHA-256: 6d39541fccd302998c2ac20079ff2bf65ee9dbbe064349712c0ef106fc76a60e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service (ttraff.cc) that is known to host malicious content. The document body text and embedded links suggest a lure to a fake repair manual, likely to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/pify?keyword=2004+mazda+6+repair+manual+pdf
    • http://files.meilensteinwein.ch/uploads/1/3/2/8/132814935/fefimefekafiruwixo.pdf
    • http://files.peopleofbudjbim.com/uploads/1/3/1/4/131483214/gajajige_gopesitojevu_viwusoref_zubomaton.pdf
    • http://files.galvestonbaycharterfishing.com/uploads/1/3/1/3/131381374/1074331.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/maratosegiwub.pdf
    • https://cdn.shopify.com/s/files/1/0431/6856/3355/files/37011084808.pdf
    • https://cdn.shopify.com/s/files/1/0435/8511/0175/files/91596098676.pdf
    • https://cdn.shopify.com/s/files/1/0439/3356/5096/files/duludowaligupad.pdf
    • https://cdn.shopify.com/s/files/1/0433/3823/6062/files/dimovezalitosef.pdf
    • https://cdn.shopify.com/s/files/1/0437/5855/1189/files/31525107846.pdf
    • https://cdn.shopify.com/s/files/1/0435/4870/4920/files/36603377203.pdf
    • https://cdn.shopify.com/s/files/1/0436/6372/0613/files/17372972369.pdf
    • https://cdn.shopify.com/s/files/1/0432/5025/3992/files/78812772733.pdf
    • https://cdn.shopify.com/s/files/1/0434/0642/6275/files/6957712729.pdf
    • https://cdn.shopify.com/s/files/1/0440/4235/4853/files/76845227092.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/rinupotisedovixunulobe.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_off00006219.bin
9e535e1d4a8aab7fd0a3aeba77d32f21f0d3f7e86bdbdcb4249e5fa9a836d4e4
pdf-font-stream PDF embedded font (sfnt) at offset 0x6219 5480 bytes
font_01_sfnt_off000074b0.bin
2d5e3787d1b88363657b53c726138157cb8ef378a366291be8425ca11efd5ab2
pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 10544 bytes