Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c364281f018367b…

MALICIOUS

PDF

41.6 KB Created: 2020-08-30 15:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea81deb4ab5999514f44b9ec5400827a SHA-1: 909b3953e7b69189869388d21e93ae3fa5bc4dd3 SHA-256: 7c364281f018367bd07bc5825c3ace32d8dd9ac251f9f253761a2d39ec656dda
154 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a link to a known malicious redirector. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.cc/wix?keyword=give+guide+napa, which is likely used to funnel victims to a phishing or malware delivery site. The presence of a link farm suggests an attempt to obscure the ultimate destination or to generate traffic for SEO manipulation.

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/wix?keyword=give+guide+napa
    • https://static.usrfiles.com/ugd/96768c_851a54242e1040c3b1b28b534f71001a.pdf
    • https://static.usrfiles.com/ugd/b8c837_ab4c978d00c7470ab9a4c85c1c16f1b3.pdf
    • https://static.usrfiles.com/ugd/b8c837_22a7c7319b0e456a8a00843f11f10d95.pdf
    • https://cdn.shopify.com/s/files/1/0431/7803/3303/files/28109933026.pdf
    • https://cdn.shopify.com/s/files/1/0431/3264/9636/files/suburban_rv_water_heater_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/3797/4950/files/lofubixeb.pdf
    • https://cdn.shopify.com/s/files/1/0432/3672/0808/files/fulipegolamexogagovet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5598/0439/files/dudelife.pdf
    • https://cdn.shopify.com/s/files/1/0437/5920/6558/files/lexelidunakotujoxelamano.pdf
    • https://cdn.shopify.com/s/files/1/0430/2422/0321/files/antisocial_personality_disorders.pdf
    • https://static.usrfiles.com/ugd/913720_734ef2a596d04558abee147959dd1bb1.pdf
    • https://static.usrfiles.com/ugd/67e251_5acdf33e8bc548e6b6c1f8db06b28e08.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_off000065cf.bin
06b8c97326a61a5136c7b01b8ec4499b6dd5358250a29586fb657ace254b7fb4
pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 4912 bytes
font_01_sfnt_off000076aa.bin
f76889a486c84b6de8d7760d35c0b5d60475ad8fc1106490e331b475e3caf4b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AA 10520 bytes