Malicious PDF — malware analysis report

Static analysis result for SHA-256 43eaa0897fdb868a…

MALICIOUS

PDF

40.4 KB Created: 2020-08-21 13:01:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a33f1715a04803fff004e58d1a608d68 SHA-1: 82569fec440336ea2f2016219d2ed98036882400 SHA-256: 43eaa0897fdb868a4b1125b738ad0e432631e8956b6ec9fb31854789436fc64b
150 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with one pointing to a known malicious redirector. The ML classifier also flagged this PDF as malicious. The embedded URL `https://ttraff.ru/pify?keyword=gymnopedie%2523+1+sheet+music` is a primary indicator of malicious intent, likely serving as a lure or redirect to further malicious content. The presence of numerous shopify links suggests a link farm or SEO manipulation tactic.

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.ru/pify?keyword=gymnopedie%2523+1+sheet+music
    • http://gajun.thegeekyside.com/uploads/1/3/1/3/131384021/7312c3512282.pdf
    • https://cdn.shopify.com/s/files/1/0435/2881/4760/files/41489673715.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/2775621277.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zabaravoxetifup.pdf
    • https://cdn.shopify.com/s/files/1/0440/5320/1046/files/42793532970.pdf
    • https://cdn.shopify.com/s/files/1/0462/4849/3205/files/toratoraxuxurilazuwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/53809937544.pdf
    • https://cdn.shopify.com/s/files/1/0431/7426/4992/files/25611544085.pdf
    • https://cdn.shopify.com/s/files/1/0433/2496/5019/files/mcquarrie_statistical_mechanics_solutions_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81256704061.pdf
    • https://cdn.shopify.com/s/files/1/0433/8289/8840/files/gupowogogaxilivo.pdf
    • https://cdn.shopify.com/s/files/1/0437/6428/5598/files/75943897450.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifowugebivagobawogun.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_off000061f4.bin
1f717c4f5c5a24c8816e36ffc1b4ea808b84112c09b087b418bd2ef3594fa19b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F4 4716 bytes
font_01_sfnt_off000071ef.bin
4fcbb969d203fe64fe5d331fa58b12db732f4c989982e30bf2f622c9825969e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EF 10256 bytes

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