Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbdffe139640727…

MALICIOUS

PDF

53.7 KB Created: 2020-08-07 22:24:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 54a40dfcf6afbd97d20824f029e3bb7e SHA-1: 9ecec63d79e91963f1298702c749d90664e85e31 SHA-256: cdbdffe13964072787d0c0cc17bf0bf4aa82c35e163f91ee30cc70c1353704f9
120 Risk Score

Malware Insights

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

The PDF document contains a link farm designed to direct users to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=sand+blasting+process+pdf. The document body itself is heavily obfuscated and appears to contain junk data, but the presence of numerous external links, many pointing to Shopify domains with numeric slugs, indicates a SEO-based link farm tactic. No scripts were extracted from this sample.

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=sand+blasting+process+pdf
    • http://files.carolinefconway.com/uploads/1/3/1/3/131397996/e80fbfc840f.pdf
    • http://files.faddabs.com/uploads/1/3/1/3/131398022/c6bdaf605b16.pdf
    • http://files.nexttonaturefarm.com/uploads/1/3/0/8/130814345/4517779.pdf
    • https://cdn.shopify.com/s/files/1/0433/1634/7035/files/72566519621.pdf
    • https://cdn.shopify.com/s/files/1/0437/9040/1687/files/24_hours_to_seconds.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/vindictus_tier_list.pdf
    • https://cdn.shopify.com/s/files/1/0435/7668/8798/files/masubuzan.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/biosynthesis_of_fatty_acids_and_triglycerides.pdf
    • https://cdn.shopify.com/s/files/1/0431/8468/5224/files/88041455444.pdf
    • https://cdn.shopify.com/s/files/1/0433/6759/6184/files/sakalivetetidedoxinetopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9434/3841/files/7903042805.pdf
    • https://cdn.shopify.com/s/files/1/0434/2425/2071/files/82382933698.pdf
    • https://cdn.shopify.com/s/files/1/0434/7065/1542/files/zukupadolakaxug.pdf
    • https://cdn.shopify.com/s/files/1/0431/4755/9066/files/china_australia_free_trade_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0429/6795/7660/files/mega_man_rom.pdf
    • https://cdn.shopify.com/s/files/1/0433/2955/2552/files/wevowevatigijinomasotu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4431/6070/files/18412846449.pdf
    • https://cdn.shopify.com/s/files/1/0435/6292/6229/files/jewivexeburonifu.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_off00009434.bin
ba30a6eafece6a86ed13cc1ca3d7b28dc198f8e12ffe7d95bd2950753667a3bf
pdf-font-stream PDF embedded font (sfnt) at offset 0x9434 5568 bytes
font_01_sfnt_off0000a730.bin
0d60683e6fb5ee80449d123195e60b6ab4c12564dda602b6174b13f8ba7b457f
pdf-font-stream PDF embedded font (sfnt) at offset 0xA730 10104 bytes