Malicious PDF — malware analysis report

Static analysis result for SHA-256 553b2e2c4fe3983b…

MALICIOUS

PDF

37.1 KB Created: 2020-08-11 19:56:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 562c503107eb470351e7bb5a09c6ec4b SHA-1: c79f411f707867042872a7b2c5018d8d7228bf29 SHA-256: 553b2e2c4fe3983b71d3ea8264fd9a53e4f1a9aff557f3b26c770314201d9791
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to a book title. The presence of numerous other PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to distribute the malicious payload. The primary malicious IOC is the redirector URL.

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.com/pify?keyword=understanding+computers+today+and+tomorrow+15th+pdf
    • http://files.accruegroupinc.com/uploads/1/3/1/4/131453615/purumanakefo-kifalilejoruv.pdf
    • http://files.aimeemcnew.com/uploads/1/3/1/0/131069764/lerokus.pdf
    • http://files.supercontinent-bp.com/uploads/1/3/1/8/131872281/6195577.pdf
    • http://files.dlindphotoartisan.com/uploads/1/3/0/9/130968993/6a8b0be706c.pdf
    • http://files.dogtrainingstandards.ca/uploads/1/3/0/9/130969300/9016e9aea0.pdf
    • https://cdn.shopify.com/s/files/1/0437/6644/8277/files/xesaxis.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/danafubefugirovozevivuba.pdf
    • https://cdn.shopify.com/s/files/1/0434/5430/0312/files/gedegorukojabajipe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/75278808376.pdf
    • https://cdn.shopify.com/s/files/1/0434/4584/6168/files/87046518871.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/1330348598.pdf
    • https://cdn.shopify.com/s/files/1/0432/0228/1633/files/xevafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/8222/7617/files/nipemifigozofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/4986/0765/files/ponalifoferibokesa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4021/9037/files/nuxomejekopuluxejaduzaxub.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mosagewenusuwaguxizekud.pdf
    • https://cdn.shopify.com/s/files/1/0438/6082/0133/files/25576006489.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_off000050e5.bin
d89ca70352d5910ec48908a19fd3fbb06e0f8ce855acc8181d89c92021c93230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50E5 5900 bytes
font_01_sfnt_off000064ec.bin
6e1b4c5436ed80bfde355dcd0f341888713f27acac115c614af8b2df908a7447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EC 10036 bytes

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