Malicious PDF — malware analysis report

Static analysis result for SHA-256 356bc1364dfc88fb…

MALICIOUS

PDF

49.1 KB Created: 2020-08-13 01:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 674a610a14f6a4c9429eddfbd4103ef0 SHA-1: 7464d0fe8241d918616f598041549d5ff58c415b SHA-256: 356bc1364dfc88fbd6a1b2d20bcc96a00bdb763c7e61f7b3412a0625789b7daa
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a direct link to a known malicious redirector. The document body, though partially corrupted, suggests a lure related to an employment attestation. The primary malicious URL identified is ttraff.ru, which is used to redirect users to further malicious content. The presence of numerous links to external PDFs, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination.

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.ru/pify?keyword=attestation+employeur+simplifi%25C3%25A9e+pdf
    • http://witet.jenniferfais.com/uploads/1/3/0/8/130874284/914f89af27b95.pdf
    • http://files.jamestrankina.com/uploads/1/3/1/8/131872178/e6891ad099.pdf
    • http://files.chrissybreslinschroeder.com/uploads/1/3/0/8/130874180/5500265.pdf
    • http://fimif.theaggiederrick.com/uploads/1/3/2/6/132681352/jutiludomokaf-sakuwolixe-volozus-waxukededu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2536/7193/files/wusizodododepivinexewe.pdf
    • https://cdn.shopify.com/s/files/1/0435/9979/0243/files/niwajadug.pdf
    • https://cdn.shopify.com/s/files/1/0429/9508/9559/files/check_if_a_number_is_prime_python.pdf
    • https://cdn.shopify.com/s/files/1/0427/7541/2902/files/39432737524.pdf
    • https://cdn.shopify.com/s/files/1/0432/5598/8374/files/pidax.pdf
    • https://cdn.shopify.com/s/files/1/0433/8669/9925/files/minimalismo_joshua.pdf
    • https://cdn.shopify.com/s/files/1/0434/1638/7733/files/81680238434.pdf
    • https://cdn.shopify.com/s/files/1/0441/3744/7576/files/chrome_delete_autocomplete_url.pdf
    • https://cdn.shopify.com/s/files/1/0432/6824/3624/files/yaseen_sharif.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5797/files/catalogo_eudora_08_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/xavixeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/5265/5002/files/98734686619.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_off00006e0c.bin
520e5b6d60af399c55018a588a80e255c8a59fba8117e1f087b00178e380ffa8
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 5300 bytes
font_01_sfnt_off00007fb4.bin
8b4ead21a1b37e65c3c5ef2cd54da5c6eaf3891e66529f17a90f8f82ee985bc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x7FB4 12600 bytes
font_02_sfnt_off0000a6f8.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0xA6F8 4324 bytes