Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a1d302c05ee4754…

MALICIOUS

PDF

45.8 KB Created: 2020-08-31 08:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b66c828e1752927da576a524734743b SHA-1: 21af0082950990b0b18e5c1f0e435bca9238fc32 SHA-256: 1a1d302c05ee475419057de5aa1357d0a2b03c72b56dcb991380ecca49ada897
120 Risk Score

Malware Insights

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

The PDF contains a link farm with 28 external PDF links, many pointing to benign content but one critical link to `https://ttraff.ru/wix?keyword=microeconomics+with+calculus+perloff` which is known malicious redirector infrastructure. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware delivery. 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.ru/wix?keyword=microeconomics+with+calculus+perloff
    • https://static.usrfiles.com/ugd/51c472_b66a489d3f65443884b3226071ca7f1f.pdf
    • https://static.usrfiles.com/ugd/5926b4_6ad208d5c2a4433bb074f9891ccbcd3e.pdf
    • https://static.usrfiles.com/ugd/8d57bd_7567ee9b6083442d902acac9b3ec396f.pdf
    • https://static.usrfiles.com/ugd/837d34_e5599d86efd94018ba31bab29ef0270d.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xibazukikamemawamiwemin.pdf
    • https://cdn.shopify.com/s/files/1/0430/0891/7657/files/xekisesugosuguzilazib.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/birthday_cake_design_photos.pdf
    • https://static.usrfiles.com/ugd/ade4e6_c7be35bbf6fa447ba9ee19b6d4c3518d.pdf
    • https://static.usrfiles.com/ugd/8b49c6_6a544e822a644c9c9f3912c4a4bafd2b.pdf
    • https://cdn.shopify.com/s/files/1/0432/8492/2526/files/in_my_life_lyrics_beatles.pdf
    • https://cdn.shopify.com/s/files/1/0430/1537/2949/files/91895894664.pdf
    • https://cdn.shopify.com/s/files/1/0446/6507/7913/files/56419571082.pdf
    • https://cdn.shopify.com/s/files/1/0436/1604/3168/files/88733619344.pdf
    • https://cdn.shopify.com/s/files/1/0434/0717/9941/files/rupizu.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_off000073fe.bin
cec77a787465e072480c475db17f0cb3e906ce9fbfe5a920ea3ae49d24196c8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73FE 5352 bytes
font_01_sfnt_off0000861f.bin
f28d060efc6977f7295afe2a5ffa1b6baeea2dd96cc7875cc1491c9fa3e997a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x861F 10592 bytes

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