Malicious PDF — malware analysis report

Static analysis result for SHA-256 12ae2a30b980e2f5…

MALICIOUS

PDF

38.4 KB Created: 2020-08-29 05:29:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 13dc4c385afacec8d95725ca4108d614 SHA-1: 54fc3da15ef47a93c504ff685b8c5ac006f0343e SHA-256: 12ae2a30b980e2f58533b6de7f8b0909fd7aaa85776aaa854d2aa004de3742d8
174 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits a PDF link farm heuristic, suggesting an attempt to obscure malicious destinations or distribute multiple malicious links. The document body, though heavily obfuscated, contains the malicious URL and several benign-looking PDF URLs, likely part of the link farm. The presence of embedded URLs and the ML classifier's high confidence further support a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=phoenix+cut+diamond+ring
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_4ee5617878fd4a9a9e61d66508453e7a.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d79f086051b493cac22bfa2ce73769c.pdf
    • https://static.usrfiles.com/ugd/b8c837_e92239d1f71f462a970f23ad998aaf7b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6671b1757c4f4f7fbbbbcd7c8b6db5f2.pdf
    • https://static.usrfiles.com/ugd/b8c837_a88509c058504f01b420aa9940b59a71.pdf
    • https://static.usrfiles.com/ugd/b8c837_607e5fb06bcc44f8b07ec7d86fae0efb.pdf
    • https://static.usrfiles.com/ugd/b8c837_77f517d36e6e4c139874a7054dd4a178.pdf
    • https://static.usrfiles.com/ugd/b8c837_f233e7da2c0f4303a7fefed87be8e8ff.pdf
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/la_sabiduria_del_eneagrama_test.pdf
    • https://cdn.shopify.com/s/files/1/0431/4805/0583/files/rizawowikive.pdf
    • https://cdn.shopify.com/s/files/1/0430/4715/7911/files/befebiselonazovulakerarez.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4731/files/election_commission_gujarat_voter_list.pdf
    • https://cdn.shopify.com/s/files/1/0434/2090/9718/files/how_to_block_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0431/8501/2900/files/dagur.pdf
    • https://cdn.shopify.com/s/files/1/0437/7817/9221/files/25657869683.pdf
    • https://cdn.shopify.com/s/files/1/0439/0027/2792/files/tunuruxurasakufelukuzabek.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_off000058a8.bin
99ede5ad44f048f2efe296ca1973c8d3cebf18b2960bdd2d3b00d6722875caea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58A8 5212 bytes
font_01_sfnt_off00006a33.bin
a0e85492e16797cc8820265ff9d44cbee4562fb0fe1605c79f8e2cb8faa16dc5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A33 10172 bytes

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