Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97209437ea5d08c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-14 21:47:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20b008022e1291095a9d25ed5234838c SHA-1: fd5de66bea5aec87569eb3aadcd39d2e8e69fbfa SHA-256: c97209437ea5d08c78ca457b7f1ef6b70446bdcdb3aae94ac1fcf88929c90775
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=25th+wedding+anniversary+cards+free'. The document body, though heavily obfuscated, also contains this URL and other Shopify links, suggesting a lure to a malicious site. The presence of a PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing and the ML_NYX_PDF_MALICIOUS flag strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=25th+wedding+anniversary+cards+free
    • http://files.kmaysphotography.com/uploads/1/3/2/6/132683264/xuvemokogizameni.pdf
    • https://cdn.shopify.com/s/files/1/0434/7196/2269/files/vezikuzo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/75167474915.pdf
    • https://cdn.shopify.com/s/files/1/0431/8530/7808/files/7390654586.pdf
    • https://cdn.shopify.com/s/files/1/0436/9563/6633/files/63198250514.pdf
    • https://cdn.shopify.com/s/files/1/0429/0691/0887/files/muxeke.pdf
    • https://cdn.shopify.com/s/files/1/0434/8909/9938/files/20754363270.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8919/files/phylum_arthropoda_classification.pdf
    • https://cdn.shopify.com/s/files/1/0450/6501/1352/files/wing_chun_tutorial_free_download.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_off000061bc.bin
ec35a7ce3088d102b0e28328b05c848d769e28d4ec467fa091da06a5bad4a93a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61BC 5668 bytes
font_01_sfnt_off0000750d.bin
d389dff516771aefcaf7a1129c6bd94b1324f7c3df6671e6610178a2d02563ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x750D 12672 bytes

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