Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0c92f538dc52cb…

MALICIOUS

PDF

44.5 KB Created: 2020-08-02 17:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 61570ad074b2dcea94623c7c672c561d SHA-1: 0878d29e14e8083f0edbb927e7edea90da22e312 SHA-256: 3e0c92f538dc52cbcb0694185bf38dbe72815ac7237ff16b416c81126e946bc1
120 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is disguised as a manual for a Whirlpool dryer. The document also contains a large number of links to other PDFs hosted on various domains, likely part of a link farm to improve search engine ranking for the malicious content. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is a strong indicator of malicious intent.

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=whirlpool+cabrio+dryer+manual+pdf
    • http://vasubezeg.travelfootball.org/uploads/1/3/1/3/131383314/25345b557.pdf
    • http://files.corybilicko.com/uploads/1/3/1/4/131408100/furabosovibamog_kixov_mazobodefub.pdf
    • http://files.michaelmillermemorialfoundation.com/uploads/1/3/1/8/131858661/pimozevotiruzoto.pdf
    • http://files.millisgirlscouts.org/uploads/1/3/0/8/130873838/taxadujotin-redimewedib-nesofipe.pdf
    • http://files.etagerellc.com/uploads/1/3/1/4/131407977/4126978.pdf
    • https://cdn.shopify.com/s/files/1/0433/5340/7646/files/58275860748.pdf
    • https://cdn.shopify.com/s/files/1/0431/0378/1015/files/secrets_of_the_teas_v_exam.pdf
    • https://cdn.shopify.com/s/files/1/0441/1061/0584/files/72226945073.pdf
    • https://cdn.shopify.com/s/files/1/0431/7007/0690/files/31111216766.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/jewaxepolirabosumasedud.pdf
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/889586324.pdf
    • https://cdn.shopify.com/s/files/1/0435/9657/8979/files/monov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8297/3346/files/45894642758.pdf
    • https://cdn.shopify.com/s/files/1/0430/8477/5577/files/kotuwususapewa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3997/3788/files/60827620297.pdf
    • https://cdn.shopify.com/s/files/1/0432/7132/3808/files/44496721350.pdf
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/25804700898.pdf
    • https://cdn.shopify.com/s/files/1/0437/9780/7265/files/desunetakulokorope.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_off00007066.bin
3fa2dface592e5a5780a4c2814d6e09f7bc09ad03548760f4df1319b177f76f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7066 5472 bytes
font_01_sfnt_off000082e4.bin
7259fd2c048715f7787530adfdd748d87693f3c5d65b7dddc4b15d44e70132b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x82E4 9884 bytes