Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b691ce8335af230…

MALICIOUS

PDF

47.2 KB Created: 2020-08-14 22:51:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b5c9bb02ee0e801d61cbf52c90dfdb SHA-1: b85bdb7fa572037b29775aafcd7b4601ef3646fd SHA-256: 6b691ce8335af2307daeee9345e10709dee1df83b62ed1154fca672d4832e514
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a large number of embedded links, identified as a link farm, with a critical heuristic firing for redirecting to known malicious infrastructure. The primary malicious URL is https://ttraff.ru/pify?keyword=odisha+reporter+mukhyamantri+ki+hai. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious content, likely as part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=odisha+reporter+mukhyamantri+ki+hai
    • http://files.drawingacrossthelines.org/uploads/1/3/1/4/131408170/dexobugeredug-kefire-mezulilebufew-gamejaxozekidud.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7153/7301/files/napoweresuzalan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0799/1195/files/facebook_messenger_for_nokia_x2-_01.pdf
    • https://cdn.shopify.com/s/files/1/0437/1356/0727/files/34214934546.pdf
    • https://cdn.shopify.com/s/files/1/0440/8272/5029/files/medium_access_control_protocol.pdf
    • https://cdn.shopify.com/s/files/1/0434/2834/8056/files/85781331417.pdf
    • https://cdn.shopify.com/s/files/1/0432/8803/5486/files/jisukolixexawolu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8218/6905/files/44704226932.pdf
    • https://cdn.shopify.com/s/files/1/0438/5413/5456/files/clasicismo_pintura.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/95936092566.pdf
    • https://cdn.shopify.com/s/files/1/0437/7405/0458/files/garabazaxitulesujokor.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007226.bin
2bcc9ae055b73b60d8f0f82f1f339c7029dc05c93700e8252f0906dd3842397b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7226 5360 bytes
font_01_sfnt_off00008441.bin
34f5923fb2b9e70ef0ea91c1fd50cf7bfd56a4369faa9787d1a90638e5088a79
pdf-font-stream PDF embedded font (sfnt) at offset 0x8441 14364 bytes