Malicious PDF — malware analysis report

Static analysis result for SHA-256 386225923adb6e6e…

MALICIOUS

PDF

38.3 KB Created: 2020-08-30 14:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d0a33babbdb0d0bc30003b3ba660488 SHA-1: 760a17f913f0da5bc605aabf0fa1737fb068a6c1 SHA-256: 386225923adb6e6ec06aca94b58d8d25e061f95473e31433123db3cd975c0a20
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link T1059.001 PowerShell

The PDF contains a malicious redirector link to 'ttraff.club' and a large number of embedded links, indicating a link farm or SEO manipulation tactic. The ML classifier strongly flagged this PDF as malicious. The document body contains the primary malicious URL and references to other PDFs hosted on Shopify, suggesting a multi-stage lure or content distribution strategy.

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.club/wix?keyword=young+chop+out+my+system+mp3
    • https://cdn.shopify.com/s/files/1/0433/9915/1768/files/kenokidake.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/gikijibexarutumenisok.pdf
    • https://cdn.shopify.com/s/files/1/0432/1063/7475/files/rabaxoragakigenitevunowif.pdf
    • https://cdn.shopify.com/s/files/1/0430/6200/1825/files/72037910863.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/vukuta.pdf
    • https://cdn.shopify.com/s/files/1/0431/2658/7549/files/20810711545.pdf
    • https://cdn.shopify.com/s/files/1/0434/1412/6759/files/29668278432.pdf
    • https://cdn.shopify.com/s/files/1/0437/7709/7886/files/wekutavojegorov.pdf
    • https://cdn.shopify.com/s/files/1/0427/9166/5830/files/sajetisemumulamikuwarele.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/26218340803.pdf
    • https://cdn.shopify.com/s/files/1/0432/1024/4256/files/46861322223.pdf
    • https://static.usrfiles.com/ugd/c63dba_d8c4812b65bc41ba806a77a5e4400c20.pdf
    • https://static.usrfiles.com/ugd/96768c_543e64139fec4f318b7797313665be86.pdf
    • https://static.usrfiles.com/ugd/fbccce_ad4ee260a1494786bd95da59bf9078d4.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000046c3.bin
d9b8a7404b5916c65c7d2a8b5e5d0ece13a1a69aa96fb19f864726abf14f3646
pdf-font-stream PDF embedded font (sfnt) at offset 0x46C3 5072 bytes
font_01_sfnt_off000057ef.bin
ac0712f67d5ff7dce59a5fefa162f967130675219ccedd458332851bed6d9b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x57EF 12324 bytes
font_02_sfnt_off00007ef7.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF7 4324 bytes