Malicious PDF — malware analysis report

Static analysis result for SHA-256 84462e55b221f751…

MALICIOUS

PDF

44.2 KB Created: 2020-08-07 07:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cfaae8bef64d9f5b61007a4ddab40de SHA-1: 7f2b60610a20f63496e3a91dc9756f58f631a3ca SHA-256: 84462e55b221f751186b39cb8b1ffaeeb50fa4cc517895edc352da2593a8b1f5
120 Risk Score

Malware Insights

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

The PDF file exhibits malicious behavior through a critical heuristic firing indicating it links to known malicious redirector infrastructure. Additionally, it contains a mass external PDF link farm, with many links pointing to Shopify-hosted PDFs. The primary malicious URL identified is https://ttraff.com/pify?keyword=bensky+materia+medica+pdf, which is likely used to redirect users to malicious content. The document body itself is heavily obfuscated and contains embedded URLs, further supporting the 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.com/pify?keyword=bensky+materia+medica+pdf
    • http://files.boomerangsandrings.com/uploads/1/3/0/7/130739987/fepuvevotat.pdf
    • http://dirak.sharonmckenzieartist.com/uploads/1/3/2/3/132303382/xesunovavomaruvevip.pdf
    • http://files.5keysyoga.com/uploads/1/3/0/8/130813965/3487277.pdf
    • http://files.seasideherbsociety.com/uploads/1/3/1/4/131406060/29115a.pdf
    • https://cdn.shopify.com/s/files/1/0433/8663/4390/files/passive_form_english_grammar.pdf
    • https://cdn.shopify.com/s/files/1/0436/5392/2981/files/97156171818.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0999/files/jolirakakozoderuz.pdf
    • https://cdn.shopify.com/s/files/1/0428/7106/2684/files/munijifodovamegivamekupad.pdf
    • https://cdn.shopify.com/s/files/1/0428/8865/9100/files/majesty_of_the_seas_deck_plan.pdf
    • https://cdn.shopify.com/s/files/1/0440/6162/2437/files/makalah_antisepsis.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/mikarabuserekiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/2670/2755/files/dopisugevimavazedesas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8155/6375/files/wodumuwezaduxewigusofu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7325/7118/files/54317780246.pdf
    • https://cdn.shopify.com/s/files/1/0436/3842/3710/files/weather_report_birdland_bass_transcription.pdf
    • https://cdn.shopify.com/s/files/1/0436/9947/0486/files/gapigegixotojajig.pdf
    • https://cdn.shopify.com/s/files/1/0431/3363/2678/files/potelofexud.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_off00006dad.bin
3bbfdb254ce92b8edf0643163b73afaf3d0d9790e6d5dcb048b31bf1089b15fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAD 5484 bytes
font_01_sfnt_off0000804a.bin
898e01afa325ebf0ed1ddf8b7f804cd50703b51b09e7162c9ddbbb4bee0c949b
pdf-font-stream PDF embedded font (sfnt) at offset 0x804A 10356 bytes