Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f3a1f98b42192b…

MALICIOUS

PDF

36.4 KB Created: 2020-08-22 23:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b966d305a5360bdbd02f00de811c3a61 SHA-1: 032b13c096a2828c05d1211e79f82e02bb2e1df0 SHA-256: a5f3a1f98b42192ba4381e2d384d7243ad16588cb50196afecc7b425f8c60cc6
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing a malicious redirector link and a large link farm. The embedded URL `https://ttraff.com/pify?keyword=all+ticket+naa+songs` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and numerous other links, many hosted on `cdn.shopify.com`, suggesting an attempt to manipulate search engine results or distribute malicious content through a large number of seemingly benign links. No scripts were extracted, but the presence of a malicious redirector and link farm strongly indicates a phishing or malware distribution attempt.

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.com/pify?keyword=all+ticket+naa+songs
    • http://nopibu.catherinehedrich.com/uploads/1/3/0/7/130775413/rajuvemuwa_pivuj.pdf
    • https://cdn.shopify.com/s/files/1/0438/2969/0528/files/19835860757.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/brimnes_ikea_bed_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/mufitosowejatubomod.pdf
    • https://cdn.shopify.com/s/files/1/0428/0591/9903/files/sisezimokurawexe.pdf
    • https://cdn.shopify.com/s/files/1/0430/5341/6601/files/84011322587.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/4077026649.pdf
    • https://cdn.shopify.com/s/files/1/0433/2965/0843/files/pifaludidobazidu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2269/7126/files/78354316981.pdf
    • https://cdn.shopify.com/s/files/1/0431/8347/2802/files/xozowemibemowun.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/33725362846.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/58531839598.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_off0000443e.bin
9e13364c64a5941bdd9809af0b27cd5f03179185a81d8845d6b34c2b451b8e8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x443E 4712 bytes
font_01_sfnt_off00005444.bin
8bea9c49dab64683d468c7113c8074e83ce22e3d4d97578fcd07fd76585a0abd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5444 10264 bytes
font_02_sfnt_off00007740.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7740 4324 bytes

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