Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f7d65ca386f6ae9…

MALICIOUS

PDF

47.8 KB Created: 2020-08-11 23:38:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e5e46ab1cecdbb2a301877cd4b7c361 SHA-1: e29cb48252de58ada8a0199d0062e991c3073f47 SHA-256: 8f7d65ca386f6ae933ddb53e595422bc8c0bae3de1d14baef0e7b54f459f18f1
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body, though heavily obfuscated, contains the URL and appears to be a lure related to a book PDF. The presence of numerous other links to external PDFs, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to increase visibility. No scripts were extracted, but the primary malicious activity is the redirection to a harmful 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.cc/pify?keyword=alguma+poesia+livro+pdf
    • http://kegodejor.ckpinkinvitational.com/uploads/1/3/1/4/131406286/6d208bc964e.pdf
    • http://files.heavencanbefound.com/uploads/1/3/1/3/131384018/tizalunovemili.pdf
    • http://files.stopanddecide.com/uploads/1/3/1/8/131856105/jiwukoguzavuti-fulol-suwolebar.pdf
    • http://files.stpeteretown.org/uploads/1/3/0/7/130738984/bf6501cf5ae7.pdf
    • https://cdn.shopify.com/s/files/1/0431/1610/1781/files/63070334400.pdf
    • https://cdn.shopify.com/s/files/1/0431/0423/9770/files/36560526839.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pegegezanonipilupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/algebra_2_book_pearson.pdf
    • https://cdn.shopify.com/s/files/1/0433/2909/3784/files/tamavazipepizi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5664/4774/files/57467028896.pdf
    • https://cdn.shopify.com/s/files/1/0429/5704/5913/files/tuwedozigitodemetogu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/poxusulijupidokubeb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86662201832.pdf
    • https://cdn.shopify.com/s/files/1/0431/4162/8072/files/oxford_handbook_of_clinical_pharmacology.pdf
    • https://cdn.shopify.com/s/files/1/0429/5085/2762/files/77541574148.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21617342462.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_off00006b63.bin
4da747dac0ac926e7cc128297d288973310a3d6e524e9a1c5e30450a03f5f32b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6B63 5104 bytes
font_01_sfnt_off00007cc9.bin
4e67c7dfdd46246d35bc3550d1c1a1d7549a69d3228c092ecf92f37f2815a448
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CC9 12684 bytes
font_02_sfnt_off0000a2fa.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2FA 4324 bytes