Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bc9768f7b41d8c8…

MALICIOUS

PDF

58.6 KB Created: 2020-08-15 22:38:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 94c2592560ace6acd72278443942e410 SHA-1: cae78c14adb7aec7f481c119ad908b267527c624 SHA-256: 4bc9768f7b41d8c8f208f7250f580ea3e8e7f08649cbe9e1f879fd4542ca94cb
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=android+bitmap+set+scale'. This indicates a likely phishing or malware distribution attempt. The document body, though heavily obfuscated, also contains this URL, reinforcing its role as a lure. The presence of numerous links hosted on Shopify, while many are benign, suggests a tactic to obscure the malicious destination among seemingly legitimate content.

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.com/pify?keyword=android+bitmap+set+scale
    • http://vepenafa.marvlindbergmysteries.com/uploads/1/3/1/4/131437792/2a4df4e2b5.pdf
    • http://files.nsp-sports.com/uploads/1/3/2/8/132814930/donov_nowinivib_diborix.pdf
    • http://files.koahspeargun.com/uploads/1/3/1/6/131606631/zufipowada.pdf
    • http://files.ohanaholistichealth.com/uploads/1/3/1/8/131871499/lalowonezukamor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/piloruj.pdf
    • https://cdn.shopify.com/s/files/1/0432/7063/5678/files/webugekev.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/55799426801.pdf
    • https://cdn.shopify.com/s/files/1/0433/6454/8762/files/wordpress_website_development_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0431/3228/9175/files/27856793171.pdf
    • https://cdn.shopify.com/s/files/1/0438/3378/6530/files/minobifofigupod.pdf
    • https://cdn.shopify.com/s/files/1/0434/5747/8823/files/le_rassemblement_dmocratique_africain.pdf
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/71731921262.pdf
    • https://cdn.shopify.com/s/files/1/0430/7910/6724/files/33007410973.pdf
    • https://cdn.shopify.com/s/files/1/0431/3192/8740/files/19635903574.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_off0000917c.bin
a671bc07a671bbdfe73b73cd030862e691fc5146d31e20104b6d94be80d36750		 pdf-font-stream PDF embedded font (sfnt) at offset 0x917C 3160 bytes
font_01_sfnt_off00009cd6.bin
23eba9bfb15b666ab0441f35f66b893ac37448f457aecdf82914c7e1915f266b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9CD6 5348 bytes
font_02_sfnt_off0000aedb.bin
8d5382bb2bfb467cbc0ba1abebcef62ffd7ccda6977910b035cbf7c0f5c29f09		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEDB 14848 bytes

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