Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a5d71d06ec91527…

MALICIOUS

PDF

46.7 KB Created: 2020-08-12 12:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af847ab61d598cf8daa63487f4022194 SHA-1: 20ab54db58f5bd6b4fd218359b6c03fd52a592ef SHA-256: 4a5d71d06ec9152776818cd041eb77fa63531512c28b42b3c0717d9da98f2c95
150 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a known malicious domain, ttraff.ru. The document body, though heavily obfuscated, contains text related to an 'errand service business plan pdf', suggesting a social engineering lure. The presence of numerous external PDF links, many hosted on Shopify, indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=errand+service+business+plan+pdf
    • http://files.honeybeeandblossom.com/uploads/1/3/1/4/131453540/sirejidavijada.pdf
    • http://files.mullanroadproject.com/uploads/1/3/1/6/131607321/jodigebuguz-kuzufo-febama-limukoroporo.pdf
    • http://files.nerdwizardartist.com/uploads/1/3/1/3/131380870/8377444.pdf
    • http://kujedet.judybakerauthor.com/uploads/1/3/1/3/131383283/2589500.pdf
    • http://fojum.metimeforthemind.com/uploads/1/3/0/9/130969465/dagegapetegora.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/pulugimurodi.pdf
    • https://cdn.shopify.com/s/files/1/0432/8580/7268/files/24101860503.pdf
    • https://cdn.shopify.com/s/files/1/0440/6145/8582/files/sejezotizeliruxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5389/files/90346670824.pdf
    • https://cdn.shopify.com/s/files/1/0434/3277/1750/files/gijeb.pdf
    • https://cdn.shopify.com/s/files/1/0433/3315/7014/files/weluxijedabefazaj.pdf
    • https://cdn.shopify.com/s/files/1/0432/2479/3245/files/78234056084.pdf
    • https://cdn.shopify.com/s/files/1/0438/5233/3206/files/82320545387.pdf
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/79924246122.pdf
    • https://cdn.shopify.com/s/files/1/0438/3758/7606/files/21242137519.pdf
    • https://cdn.shopify.com/s/files/1/0433/9807/0435/files/aptitude_test_questions_and_answers_with_solutions_in_sinhala.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/
    • https://cdn.shopify.com/s/files/1/0438/5233/3206/files/82320545

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ac0.bin
a30cbd3b30e96267cc8cbd6df80a0266c9a8e9cb74a116a427267c39dec5e7e2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6AC0 4996 bytes
font_01_sfnt_off00007bbd.bin
2b03e83fd70e345bd8eae6fc034bd41a001a8a2a6f1e523b01df626377169d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBD 10452 bytes
font_02_sfnt_off00009f6a.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230
pdf-font-stream PDF embedded font (sfnt) at offset 0x9F6A 4324 bytes