Malicious PDF — malware analysis report

Static analysis result for SHA-256 cab333a27ab106f7…

MALICIOUS

PDF

62.4 KB Created: 2020-08-08 13:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73f9379f84fe4f376d18a4c3831b47be SHA-1: add095767f596c1a24ccea64988c1aa657d5e716 SHA-256: cab333a27ab106f771edefe80ec4d580d543bad8dd4fec5f279baf9adbc45b97
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF contains a heuristic firing for a malicious redirector link and a link farm, indicating a phishing or scam attempt. The embedded URL in the document body, 'https://ttraff.cc/pify?keyword=ielts+academic+writing+task+2+structure+pdf', is a known malicious redirector. The document appears to be a lure for academic content to trick users into clicking the malicious link.

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.cc/pify?keyword=ielts+academic+writing+task+2+structure+pdf
    • http://files.gssammamishdaycamp.org/uploads/1/3/0/7/130776449/rexaj-jajemumuguw.pdf
    • http://vudiderur.desiree-lim.com/uploads/1/3/1/4/131454549/5821574.pdf
    • http://files.stonecreekreflections.com/uploads/1/3/0/8/130813827/45b8be0.pdf
    • http://files.mobilecraftbottlingcompany.com/uploads/1/3/2/7/132740511/menotigezewutebar.pdf
    • http://files.rcprayertabernacle.com/uploads/1/3/1/4/131407247/gajeredijesugug_masulez_ragifejimi_konomofej.pdf
    • https://cdn.shopify.com/s/files/1/0433/0360/0283/files/josefuxuxuvuborumak.pdf
    • https://cdn.shopify.com/s/files/1/0437/3417/1813/files/12243960431.pdf
    • https://cdn.shopify.com/s/files/1/0440/1407/6069/files/94404827716.pdf
    • https://cdn.shopify.com/s/files/1/0440/8731/2536/files/52707952810.pdf
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/introductory_chemistry_zumdahl.pdf
    • https://cdn.shopify.com/s/files/1/0429/4495/4527/files/roveriwuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/2693/1099/files/acute_bronchitis.pdf
    • https://cdn.shopify.com/s/files/1/0432/7066/8453/files/winipusepanejolojatiz.pdf
    • https://cdn.shopify.com/s/files/1/0428/1381/6995/files/law_of_triangle_of_forces.pdf
    • https://cdn.shopify.com/s/files/1/0431/5293/3021/files/botiborifinut.pdf
    • https://cdn.shopify.com/s/files/1/0451/1835/7669/files/timberlake_chemistry.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_off0000b497.bin
01bdf2995a97fad3a3617eeda5e7dbde956dfd883a1dcef779748748d213f594		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB497 5700 bytes
font_01_sfnt_off0000c807.bin
4a60c2129eb76ff8575b0c0a9a2b7eeb254d9d211dce89296544af3fe41adaa8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC807 10588 bytes

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