Malicious PDF — malware analysis report

Static analysis result for SHA-256 e623912b543f04c1…

MALICIOUS

PDF

36.3 KB Created: 2020-08-02 17:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca19273b4da38abb11762953df54622d SHA-1: 62a5942d193045c6367349fc2fb6be38725cd101 SHA-256: e623912b543f04c1a401444325392264d2722f232fedafa03e6a1f09fdef6715
128 Risk Score

Malware Insights

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

The PDF contains a clear lure for a "GPU boost download" and links to a redirector URL. The document also hosts a large number of external PDF files, many of which are hosted on Shopify, suggesting a link farm or distribution network. The primary malicious URL identified is ttraff.ru, which is known for malicious redirector activity. The presence of a "download button" heuristic further supports the malicious intent.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gpu+boost+download
    • http://files.bannisterrunning.com/uploads/1/3/0/7/130740033/gimedufa.pdf
    • http://files.seedsforchangewellness.com/uploads/1/3/1/8/131856271/f866beb8a9e6.pdf
    • http://files.yourbesthealthbyfriday.com/uploads/1/3/2/8/132816036/narexalixoxavaduruza.pdf
    • https://cdn.shopify.com/s/files/1/0440/5228/3542/files/fapopewifu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6186/2810/files/pewedimazuzapuke.pdf
    • https://cdn.shopify.com/s/files/1/0433/1637/9816/files/vururofixefufozul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/larabobed.pdf
    • https://cdn.shopify.com/s/files/1/0430/4925/5061/files/guvuzidonejawebesovuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6219/0499/files/xozolepubopovaxatifokum.pdf
    • https://cdn.shopify.com/s/files/1/0434/2893/7880/files/tro_chemistry_a_molecular_approach_3e.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/separation_process_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0431/7813/1611/files/59520298430.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/45439773983.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/lopiz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004436.bin
724e4e2879b15d0f98ff336e78180e8998e19f6053cf52262287aa7ea543767e
pdf-font-stream PDF embedded font (sfnt) at offset 0x4436 4836 bytes
font_01_sfnt_off000054bd.bin
669d46ec5c247892065db9cb10111f0ffed900eb8c8313520dfc18f5002191e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x54BD 9488 bytes
font_02_sfnt_off0000751d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176
pdf-font-stream PDF embedded font (sfnt) at offset 0x751D 4324 bytes