Malicious PDF — malware analysis report

Static analysis result for SHA-256 92841942a2b7e125…

MALICIOUS

PDF

49.1 KB Created: 2020-08-29 09:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e6597a89c03bfad05544319e0f39197 SHA-1: a880e28e334cf192f0668637e76e384264b211e2 SHA-256: 92841942a2b7e125ee83d5bad9392487fa6c6221e160b2c3c86609cc2f8676fb
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 with a keyword related to 'Sims 4'. The document body, though heavily obfuscated, also contains this URL. The presence of a large number of embedded links, many pointing to Shopify domains, suggests a link farm or redirection strategy. The primary malicious intent appears to be directing the user to the ttraff.ru URL.

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/wix?keyword=sims+4+add+more+sims+to+household
    • https://cdn.shopify.com/s/files/1/0427/7246/3772/files/losomu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7663/9127/files/completing_the_square_using_algebra_tiles_answers.pdf
    • https://cdn.shopify.com/s/files/1/0434/0364/0984/files/general_computer_knowledge_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/tv_listings_winnipeg.pdf
    • https://cdn.shopify.com/s/files/1/0436/1306/1277/files/44109065788.pdf
    • https://static.usrfiles.com/ugd/b8c837_7104a7ca51f5421692aa516abb9af24d.pdf
    • https://static.usrfiles.com/ugd/b8c837_4972db4326a641a2ad3352bd9405140f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ccc27ae87d3470b8452156fc45d0996.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fdb5595d6d84fc2bf094d40cd297c78.pdf
    • https://static.usrfiles.com/ugd/b8c837_6b3c28caa47b4b82a743482ddadeec86.pdf
    • https://cdn.shopify.com/s/files/1/0462/7372/4576/files/8756220171.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/lelape.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/dogukodisabupeg.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zavoriduxosijalas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6161/files/venidivoxawon.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/balugudizazivefamijulija.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/37644110659.pdf
    • https://cdn.shopify.com/s/files/1/0429/6205/9427/files/fomusez.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_off000073c7.bin
1cb45f7da3e2b0b8fd2b1650351bb4421586cb3957b211f9a175318578a267ec
pdf-font-stream PDF embedded font (sfnt) at offset 0x73C7 5256 bytes
font_01_sfnt_off00008578.bin
a9d542613a7dcac4a67ae510e618eeb7601adb50606fbb5eb419faad27d7f688
pdf-font-stream PDF embedded font (sfnt) at offset 0x8578 15588 bytes