Malicious PDF — malware analysis report

Static analysis result for SHA-256 e328f7e3829addf8…

MALICIOUS

PDF

42.0 KB Created: 2020-08-14 15:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77ac5902f0e70cd7732a57196a01f194 SHA-1: af719f83cb23b3bc0da51661d79d3d412ac1927e SHA-256: e328f7e3829addf8e617587b9fed775c62adda0aa349a3bfc79ff20481ee3e84
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.cc. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a free audiobook. This suggests a phishing or social engineering attack aiming to redirect users to malicious sites. The presence of numerous external PDF links further supports a link farm or SEO poisoning tactic.

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=brain+rules+audiobook++free
    • http://jusuxuvuw.100x35online.com/uploads/1/3/2/7/132710621/2c1205.pdf
    • http://files.montcoantihunger.org/uploads/1/3/1/3/131380029/polatizejujepive.pdf
    • http://files.seanhuttonmusic.com/uploads/1/3/1/4/131453255/soxitajudonut.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/73363311778.pdf
    • https://cdn.shopify.com/s/files/1/0432/4501/1112/files/76059209354.pdf
    • https://cdn.shopify.com/s/files/1/0435/7623/0047/files/49884714176.pdf
    • https://cdn.shopify.com/s/files/1/0435/3146/8951/files/74174593371.pdf
    • https://cdn.shopify.com/s/files/1/0432/5595/5619/files/lofulewojojafufazolut.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/95989130521.pdf
    • https://cdn.shopify.com/s/files/1/0432/7230/6852/files/wabaxidev.pdf
    • https://cdn.shopify.com/s/files/1/0439/1819/6891/files/college_application_checklist.pdf
    • https://cdn.shopify.com/s/files/1/0432/3213/3278/files/jefamijurefiludom.pdf
    • https://cdn.shopify.com/s/files/1/0434/4138/9724/files/69541872901.pdf
    • https://cdn.shopify.com/s/files/1/0433/7978/5891/files/21326459847.pdf
    • https://cdn.shopify.com/s/files/1/0435/3739/9960/files/zusuxakezexoxoja.pdf
    • https://cdn.shopify.com/s/files/1/0437/8961/5266/files/fagotutisidetisuvuz.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_off0000673a.bin
9d96b7c3c2178be38885ebb10333e2dca538ed7f1481a7eab05c8a044cda94cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x673A 5156 bytes
font_01_sfnt_off000078c9.bin
82deafc9fce2d51cd6ffe3688a0e2db5760f1325e780a34a011d16b5aae4196f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78C9 10064 bytes

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