Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94765518f7fb9c6…

MALICIOUS

PDF

43.4 KB Created: 2020-08-04 05:48:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7a528213fb425f26c0ee94e73758f7f SHA-1: 5f25f90763df83751611e7cdf232f5e5b36bdba0 SHA-256: c94765518f7fb9c6ee2782f95a96a59d6b0b07aed9f9885e51e3303cc248a53d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.cc'. This suggests a link farm or SEO poisoning tactic designed to funnel users to malicious content. The ML classifier strongly supports the malicious verdict. No scripts were extracted, limiting the analysis of direct payload delivery mechanisms.

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=game+of+life+quarter+life+crisis+instructions+pdf
    • http://files.diypaintguy.com/uploads/1/3/2/7/132740949/zasif-wisosejupibeso-dasovag-larozovivatizog.pdf
    • http://files.thaischool.org/uploads/1/3/0/8/130815277/3903680.pdf
    • http://goxovu.campcardiac.org/uploads/1/3/1/4/131437984/2c937cc67cfd5.pdf
    • https://cdn.shopify.com/s/files/1/0433/4796/8149/files/6297128968.pdf
    • https://cdn.shopify.com/s/files/1/0433/6769/4490/files/47624416975.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9625/files/sixubitademo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8320/2711/files/twister_game_rules.pdf
    • https://cdn.shopify.com/s/files/1/0431/1308/7142/files/voluwileduvokojiweruj.pdf
    • https://cdn.shopify.com/s/files/1/0433/7762/3194/files/80339666251.pdf
    • https://cdn.shopify.com/s/files/1/0435/6092/7393/files/century_link_modem.pdf
    • https://cdn.shopify.com/s/files/1/0437/7310/0184/files/ati_teas_study_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6952/1568/files/tamefinefofofa.pdf
    • https://cdn.shopify.com/s/files/1/0431/6299/2799/files/vamaja.pdf
    • https://cdn.shopify.com/s/files/1/0434/1573/2376/files/jenomopa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0903/2863/files/judujumofurisusesituvave.pdf
    • https://cdn.shopify.com/s/files/1/0435/8576/5533/files/xisewido.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c6.bin
7439498d276dcf3e33aa79f9a564f73c0df7377de8fe638804da153412293c39
pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 5460 bytes
font_01_sfnt_off00007c42.bin
1b783c575ad46d8d8522421a4d742fe556b76ae46cbf9be97149a26d57e80555
pdf-font-stream PDF embedded font (sfnt) at offset 0x7C42 10712 bytes