Malicious PDF — malware analysis report

Static analysis result for SHA-256 54dbb8e4f74f710b…

MALICIOUS

PDF

41.6 KB Created: 2020-09-02 12:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 816b4d348a51530eb4e32ad885a65d20 SHA-1: 72e74b1a5d00171ee07a8df63181766b94a80634 SHA-256: 54dbb8e4f74f710bc27649082a40fe8a8a37a9d1da1bd67543e1d98e1539becb
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wix?keyword=approval+forms+online'. The document body, though heavily obfuscated, contains text that appears to be a lure for "Approval forms online". The file also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=approval+forms+online
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/siporenuteluzonekin.pdf
    • https://cdn.shopify.com/s/files/1/0430/3696/7063/files/rexiwolusojonajivutewis.pdf
    • https://cdn.shopify.com/s/files/1/0435/3005/9927/files/acoustic_levitation.pdf
    • https://cdn.shopify.com/s/files/1/0437/8876/3298/files/in_cold_blood_epub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5385/0524/files/56640396020.pdf
    • https://cdn.shopify.com/s/files/1/0433/2666/8952/files/72945636059.pdf
    • https://cdn.shopify.com/s/files/1/0432/6588/4313/files/milelosedagokafa.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/paxuful.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32878299647.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/resowewutasugurenojatojap.pdf
    • https://cdn.shopify.com/s/files/1/0432/6955/4329/files/pogo_games_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/2572/6614/files/irs_nol_carryover_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5229/files/99830049295.pdf
    • https://static.usrfiles.com/ugd/d99ef3_17e6609284f9401d9d7bf40cae8d5279.pdf
    • https://static.usrfiles.com/ugd/2ca22b_b1137c108ae6437b980c31a7ead5a89f.pdf
    • https://static.usrfiles.com/ugd/e4d7df_fca15a9f96834b4892d88d7fefe9bf41.pdf
    • https://static.usrfiles.com/ugd/4117a9_458761f2b05544c79da17ffdffbd5379.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_off00006418.bin
bb0f5a12d88d700486df03ddd8814fc0fc9ce15968588ac0ec0057b4cae1ea5a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6418 5096 bytes
font_01_sfnt_off00007563.bin
29c82cd62b4fafff6ca62e8a5555368903c99a6ef8cd1e9473bc6fc761a044b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7563 10536 bytes

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