Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23a15adc9f7759c…

MALICIOUS

PDF

45.2 KB Created: 2020-08-18 22:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: baa29e089d1b32b72e71fd47ce098f2a SHA-1: e89e4efa759b57f5db9f28f3c8fa225d3795c2b0 SHA-256: a23a15adc9f7759c84d21f6beba64343fa145fdc8f74f96e960c94d2f9b1b740
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, with the primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Infographic timeline powerpoint template' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The ML classifier also strongly indicated maliciousness.

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=infographic+timeline+powerpoint+template
    • http://gujog.ladymarigold.com/uploads/1/3/1/6/131606490/6236420.pdf
    • https://cdn.shopify.com/s/files/1/0428/7892/7014/files/wewunorilibisagutizosul.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/mogejapufi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/25980576257.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3363/files/pathfinder_rime_spell.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/98559129476.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/81911814569.pdf
    • https://cdn.shopify.com/s/files/1/0435/3202/6008/files/maduzi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2655/3752/files/wild_n_out_full_episodes.pdf
    • https://cdn.shopify.com/s/files/1/0436/8252/9445/files/chair_conformation_cis_vs_trans.pdf
    • https://cdn.shopify.com/s/files/1/0431/2370/3969/files/mumobanowudatizomow.pdf
    • https://cdn.shopify.com/s/files/1/0433/1972/2152/files/loxadi.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_off000071ec.bin
f89e3ee1c6dd9327c48c28ff0652b860916b5f4cf895e9b58c259772d3b32b18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71EC 5280 bytes
font_01_sfnt_off000083c9.bin
afb9351635c67a60031a4336415c67376f77441958316f03fccd1b31b22722eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83C9 10572 bytes

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