Malicious PDF — malware analysis report

Static analysis result for SHA-256 235bbe4150ea9fcb…

MALICIOUS

PDF

41.1 KB Created: 2020-08-25 14:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6528ce581b1bc4453f81acab1f8b9594 SHA-1: 028207a64752e4f266523064bdf03035c2e2f091 SHA-256: 235bbe4150ea9fcbce6091c8ed1fe977d546e9cbb52e5bc95482b79f09900790
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which are hosted on Shopify but ultimately redirect through a known malicious domain, ttraff.ru. This indicates a link farm or SEO poisoning tactic designed to lure users to malicious infrastructure. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is the primary indicator of compromise.

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/pify?keyword=datasheet+2n2222+metalico
    • http://files.rocykafotografie.nl/uploads/1/3/1/4/131454221/6072518.pdf
    • http://files.ltowngaragellc.com/uploads/1/3/1/3/131379594/lobowifebugos.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/47066702867.pdf
    • https://cdn.shopify.com/s/files/1/0433/3237/0590/files/games_for_pc_dolphin_emulator_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/kilcummin_surf_report.pdf
    • https://cdn.shopify.com/s/files/1/0431/6305/8325/files/pyrimidine_metabolism.pdf
    • https://cdn.shopify.com/s/files/1/0430/7507/6258/files/chhota_bheem_song_please.pdf
    • https://cdn.shopify.com/s/files/1/0431/8153/9489/files/88039259467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57727452667.pdf
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/xirolitebajelazog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7548/5339/files/22798196530.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004229.bin
5ebcf4e12fc1e02633c320b10ce3a295e3420fef9cfd345f44ab3a9f3b09b232		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4229 3576 bytes
font_01_sfnt_off00004ef4.bin
9d56c5ab5ee06726466f4416a741108a277d5666a7949417d9b159a62f3c3127		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4EF4 4860 bytes
font_02_sfnt_off00005f45.bin
0f903dbf76dab80629986aed1004f5b2c9f640af3228ea863f4a4c3352de8379		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F45 12892 bytes
font_03_sfnt_off00008790.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8790 4324 bytes

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