Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f751e229a18e2c3…

MALICIOUS

PDF

42.0 KB Created: 2020-08-17 04:29:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8319b00d13371493d1fc59a79e523855 SHA-1: 7d42a913feb757b52795f78709c684ccad7b4349 SHA-256: 3f751e229a18e2c32dd0cb8fbc933ead01432ab1a9ce2c600722412890ce202b
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.cc'. The document body, though heavily obfuscated, contains the same URL and text related to merging PDF files, suggesting a lure. The presence of numerous external links, many hosted on Shopify, further indicates a link farm or redirection strategy. The file was generated by wkhtmltopdf, a tool often used for creating PDFs from web content, which could facilitate this redirection.

Heuristics 3

  • 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.
  • 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=fusionner+fichiers+pdf+en+ligne+gratuit
    • http://files.globalwarmingvector.com/uploads/1/3/0/7/130776602/2418340.pdf
    • http://files.feastcookingschool.com/uploads/1/3/2/7/132740541/2679036.pdf
    • http://files.allstarskaraoke.com/uploads/1/3/2/6/132681694/3645021.pdf
    • http://files.cttntraumatraining.org/uploads/1/3/1/4/131453241/xumivomezitazawitotu.pdf
    • http://files.bethanylutheranrlf.com/uploads/1/3/1/3/131381819/sizumomonogup.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/fejaravogubudon.pdf
    • https://cdn.shopify.com/s/files/1/0431/9415/5170/files/36817059095.pdf
    • https://cdn.shopify.com/s/files/1/0428/9508/1635/files/50009274711.pdf
    • https://cdn.shopify.com/s/files/1/0434/8516/7766/files/duxilenunuzazamonadilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/bikini_body_guide_week_1_12.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nanejixiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/2597/2904/files/99074520255.pdf
    • https://cdn.shopify.com/s/files/1/0433/7883/5606/files/45447967489.pdf
    • https://cdn.shopify.com/s/files/1/0437/3023/9637/files/antianemic_drugs.pdf
    • https://cdn.shopify.com/s/files/1/0429/5386/7427/files/woropobupu.pdf
    • https://cdn.shopify.com/s/files/1/0434/8038/3653/files/bls_american_heart_association_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/seralewi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5637/3670/files/brassica_juncea_medicinal_uses.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_off000062fa.bin
e3571da0eb25abdb726a51a60096b69b2402f26cc4422f6a5dbaadfff06741f2
pdf-font-stream PDF embedded font (sfnt) at offset 0x62FA 5372 bytes
font_01_sfnt_off0000753e.bin
4fc9a86f45dd87acfbd9fd328228d555544a60440fa7e5395c2fd68afebfd275
pdf-font-stream PDF embedded font (sfnt) at offset 0x753E 11264 bytes