Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0b04273fcbb3188…

MALICIOUS

PDF

56.1 KB Created: 2020-08-19 04:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fa3affad45aaadfbdf172262f733d5c SHA-1: c69b1c1f609a89979cc994d8fc013f12dbe17b5b SHA-256: f0b04273fcbb31888cdb5c8525b147f9ea493b3647f5f0901b39461d7fdb9d73
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is designed to lure users into clicking on it. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise malicious content as a free book. The PDF also hosts a large number of external links, many pointing to Shopify, likely as part of an SEO link farm to improve search engine ranking for malicious content. No scripts were extracted, but the presence of a malicious redirector and the link farm technique strongly indicate a phishing or social engineering attack.

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.com/pify?keyword=cookie+and+friends+teacher%2527+s+book+free
    • http://ganonukud.stmarybythesea.com/uploads/1/3/1/1/131163599/8116933.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suxuteregejo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0727/0297/files/28881706203.pdf
    • https://cdn.shopify.com/s/files/1/0431/3903/9388/files/twinkle_twinkle_little_star_poem_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/qualities_of_good_research_problem.pdf
    • https://cdn.shopify.com/s/files/1/0435/9477/6739/files/bull_shoals_lake_map.pdf
    • https://cdn.shopify.com/s/files/1/0431/3579/5354/files/miwadexipab.pdf
    • https://cdn.shopify.com/s/files/1/0435/7367/4142/files/psychology_understanding_human_behavior.pdf
    • https://cdn.shopify.com/s/files/1/0433/0933/4696/files/77726748312.pdf
    • https://cdn.shopify.com/s/files/1/0435/5407/8871/files/8_ball_pool_club_game.pdf
    • https://cdn.shopify.com/s/files/1/0431/4451/1645/files/wikokogovajire.pdf
    • https://cdn.shopify.com/s/files/1/0432/2341/6987/files/21562522493.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/19166082580.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9794/files/weekly_schedule_template_with_times.pdf
    • https://cdn.shopify.com/s/files/1/0430/2353/2195/files/tisamubasajamow.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_off00007942.bin
6884fef099f26e17c3021244997c23ecb407a2fc58723a29b0a5894a77405281
pdf-font-stream PDF embedded font (sfnt) at offset 0x7942 5220 bytes
font_01_sfnt_off00008b04.bin
03138ee1fde4331bd7462370c3b64b8da88d4596bb57461ac602e4c13fe6fe63
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B04 16920 bytes
font_02_sfnt_off0000be1b.bin
43e84046d57c5d8edad47de9228ce36feb53c5e515436c294a71041590f3a3a6
pdf-font-stream PDF embedded font (sfnt) at offset 0xBE1B 16132 bytes