Malicious PDF — malware analysis report

Static analysis result for SHA-256 4736b60282e9e3a9…

MALICIOUS

PDF

43.6 KB Created: 2020-08-13 02:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 92fc5db308f985428384c6d085865436 SHA-1: 29e98862256cca324d9f5180b07f5ea647efa4f2 SHA-256: 4736b60282e9e3a90c3696c41abb4d149e481c90093ab2b1975c5dbaade17af8
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which are SEO-optimized and point to PDF files hosted on Shopify. One critical heuristic indicates a malicious redirector link, specifically 'https://ttraff.ru/pify?keyword=algebra+textbook+online+pdf', which is presented in the document body. This suggests a phishing or scam attempt using a lure of educational material to redirect users to malicious infrastructure.

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=algebra+textbook+online+pdf
    • http://wozonej.rarebirdediting.com/uploads/1/3/2/3/132302978/9715967.pdf
    • http://reboken.100x35online.com/uploads/1/3/0/8/130874250/dirasatekalu.pdf
    • http://xedewis.daeodain.com/uploads/1/3/1/3/131380042/3745831.pdf
    • http://files.mountainrescueinstitute.com/uploads/1/3/1/1/131164446/472943.pdf
    • http://files.mountainrescueinstitute.com/upl
    • https://cdn.shopify.com/s/files/1/0446/2054/6211/files/91829185530.pdf
    • https://cdn.shopify.com/s/files/1/0437/9131/9200/files/76338237063.pdf
    • https://cdn.shopify.com/s/files/1/0437/2430/8630/files/55715745582.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/rifts_world_book_5.pdf
    • https://cdn.shopify.com/s/files/1/0428/2246/7750/files/54928705774.pdf
    • https://cdn.shopify.com/s/files/1/0432/5310/4790/files/ganuwifakuzizifadukitede.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1411/files/duzunagapu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/63912397784.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/93511720057.pdf
    • https://cdn.shopify.com/s/files/1/0431/8475/0743/files/xosusotiroxa.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/pefek.pdf
    • https://cdn.shopify.com/s/files/1/0436/4396/1494/files/jolirumimubojubul.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_off00006a48.bin
79d5e0c51d6b8c435fa6d240f520fc02d6b9d11651c0402581e49f8588a50a09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A48 5292 bytes
font_01_sfnt_off00007c58.bin
6a772f633f5b92bbdd8356f4ce6f72117504c6551133cd1141c428c39e47cb01		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C58 10760 bytes

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