Malicious PDF — malware analysis report

Static analysis result for SHA-256 693d76e99a3d2530…

MALICIOUS

PDF

44.3 KB Created: 2020-08-19 08:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07513881fb3b97fca990eff40193f873 SHA-1: 894f1b03d2a4af0308a13bfe89a527785461e63f SHA-256: 693d76e99a3d253052c77fa4ea608f94a956d415b5664d001c65b0a863731a7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for users searching for '100 cotton bed sheets full size'. The presence of numerous other links, many pointing to Shopify, suggests a link farm or SEO manipulation tactic to distribute the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=100+cotton+bed+sheets+full+size
    • http://files.annieseatonartadvisor.com/uploads/1/3/1/4/131437924/beef5c.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/4392/1820/files/jusipajamatefiludi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/double_your_dating.pdf
    • https://cdn.shopify.com/s/files/1/0429/6271/4773/files/toxuzalogilunaxobixokago.pdf
    • https://cdn.shopify.com/s/files/1/0444/2878/7878/files/99323160974.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/dolit.pdf
    • https://cdn.shopify.com/s/files/1/0434/5790/4792/files/15304791921.pdf
    • https://cdn.shopify.com/s/files/1/0440/7446/7478/files/43742185377.pdf
    • https://cdn.shopify.com/s/files/1/0431/6826/8456/files/lg_v20_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/hiring_a_public_room_listening_answers.pdf
    • https://cdn.shopify.com/s/files/1/0440/5395/4710/files/sabudulag.pdf
    • https://cdn.shopify.com/s/files/1/0432/7404/3556/files/bivisetisofemuzitufukivog.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062b7.bin
c3eca82eaf72a85a9967e0b12bfe657faa5ce8fb43c801cec661e5f4ef120274
pdf-font-stream PDF embedded font (sfnt) at offset 0x62B7 4976 bytes
font_01_sfnt_off0000739c.bin
aba443e48851d782e0475a77a47dcc4567675efefcb016721ab554bf3ba8ae01
pdf-font-stream PDF embedded font (sfnt) at offset 0x739C 10292 bytes
font_02_sfnt_off000096b8.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B8 4324 bytes