Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8843aa7bb87e10…

MALICIOUS

PDF

45.8 KB Created: 2020-08-23 22:52:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5eafa2ad43552523836dce0d26b5a3f SHA-1: f11f3237cd052e8910a0ec9a088b051daa897016 SHA-256: 9e8843aa7bb87e10cbbf62bcc1e794f07a36dc067aedd4a4dd4684ec5da93dde
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a consumer report on SUV tires. This indicates a phishing or scam attempt. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many pointing to Shopify domains, likely for SEO manipulation or to host further malicious content. The ML classifier strongly flagged this PDF as malicious.

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/pify?keyword=best+suv+tires+consumer+reports
    • http://files.tucsontattooexpo.com/uploads/1/3/1/0/131071151/bekobipal_nakokataw_rejezekiwum_kujim.pdf
    • https://cdn.shopify.com/s/files/1/0434/1301/2641/files/22103984990.pdf
    • https://cdn.shopify.com/s/files/1/0434/6347/5352/files/kafifudobajabewom.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/selozilovun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3906/4225/files/60845338620.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/ft_video_fem.pdf
    • https://cdn.shopify.com/s/files/1/0434/2651/3048/files/mawunowonosomisujadat.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7679/files/polaxawumiradudibegiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/4344/5141/files/rirejonep.pdf
    • https://cdn.shopify.com/s/files/1/0435/5994/4353/files/51340607910.pdf
    • https://cdn.shopify.com/s/files/1/0443/9041/6550/files/application_for_job_format.pdf
    • https://cdn.shopify.com/s/files/1/0427/9851/4343/files/sparc_mac_net_worth.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_off00007529.bin
71a4501a538dcdfcfea9e791970ccb106e48b1d973b87a6245bacb9b69d9183e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7529 4948 bytes
font_01_sfnt_off000085eb.bin
82a1caaf4ef5223cb5de2988226c2e1d4879fba4ae6e90f78c1a7ce065383dd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x85EB 10772 bytes