Malicious PDF — malware analysis report

Static analysis result for SHA-256 564c73ff7c0e6106…

MALICIOUS

PDF

45.8 KB Created: 2020-08-02 19:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a99a123ad29a66e4695ee1e482d14b5d SHA-1: 51f899d8cfd4c8332b08461bcd95b436311acf1c SHA-256: 564c73ff7c0e61067f9fb73f03b3919a36f27ec2e1ed3b258b18a28bba90a03b
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a large number of external PDF links, indicating a link farm strategy. The primary malicious URL identified is https://ttraff.cc/pify?keyword=avenir+font+family. The ML classifier strongly flagged this PDF as malicious, supporting the presence of malicious content. The document body appears to be obfuscated or corrupted, but the presence of the URL within the document structure is sufficient evidence.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=avenir+font+family
    • http://files.salvadorpaniagua.com/uploads/1/3/0/7/130738548/xujanofewi.pdf
    • http://files.nextllcenter.com/uploads/1/3/1/4/131406149/pesuvusetap-sopop-jukekozipo-wexis.pdf
    • http://files.mikenewman.info/uploads/1/3/2/6/132681855/7783703.pdf
    • https://cdn.shopify.com/s/files/1/0436/7400/9753/files/palikeluzekoxomevoripu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/50080795394.pdf
    • https://cdn.shopify.com/s/files/1/0428/5533/4055/files/hero_session_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/8713/4882/files/87727021011.pdf
    • https://cdn.shopify.com/s/files/1/0433/6369/6799/files/goxubiwufagujepujiro.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/labutuvujovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5507/0880/files/jedizirekaforewifuluwu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5928/1061/files/84463028572.pdf
    • https://cdn.shopify.com/s/files/1/0437/3191/0810/files/19050873621.pdf
    • https://cdn.shopify.com/s/files/1/0444/1748/2919/files/acls_study_guide_2015.pdf
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/western_union_receipt_generator_v2.pdf
    • https://cdn.shopify.com/s/files/1/0434/6881/6544/files/jafakukebejifigewaj.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_off000071f2.bin
1cca34d65188632b2bac99a6dcd06bc85f70794c183559fa2a42f1b6f3cc751c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71F2 4884 bytes
font_01_sfnt_off00008285.bin
fd13a373a3d703cc8dd942b231ab3e5fff21be18aa12a1659665665928ca45c6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8285 12588 bytes

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