Malicious PDF — malware analysis report

Static analysis result for SHA-256 df49bdda902032a8…

MALICIOUS

PDF

54.6 KB Created: 2020-08-05 00:07:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b86238af937a5c1c7a1fa55351ad321e SHA-1: e09667b6b6169d100f202d83cc49ddb4bd709c72 SHA-256: df49bdda902032a8a7985c105b08ce661d1c31e8ee76d68a2126fddd94de614b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/pify?keyword=argumentative+essay+examples+pdf'. This URL is presented within the document body, suggesting a social engineering lure to disguise the malicious intent. The PDF also contains a link farm, indicating a potential SEO poisoning or spamming campaign. The ML classifier strongly supports the malicious nature of this PDF.

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=argumentative+essay+examples+pdf
    • http://files.firstgradetweets.com/uploads/1/3/1/0/131070487/815682.pdf
    • http://files.peninsulafap.org/uploads/1/3/0/7/130775402/6238674.pdf
    • http://sejilizon.urbanrenewaljazz.com/uploads/1/3/0/9/130969204/fusamar.pdf
    • http://files.firstgradetweets.com/uploads/1/3/1/0/131070487/8
    • https://cdn.shopify.com/s/files/1/0434/0590/1991/files/86666525000.pdf
    • https://cdn.shopify.com/s/files/1/0428/5802/1027/files/63680367044.pdf
    • https://cdn.shopify.com/s/files/1/0437/6772/6232/files/how_to_archive_emails_in_outlook_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/24061755049.pdf
    • https://cdn.shopify.com/s/files/1/0435/5352/1823/files/fofatusimovituj.pdf
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/tubogabopafudalazogixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8266/1526/files/engineering_leveling_guide_vanilla.pdf
    • https://cdn.shopify.com/s/files/1/0429/5573/5203/files/7874938430.pdf
    • https://cdn.shopify.com/s/files/1/0431/7567/4014/files/53561068646.pdf
    • https://cdn.shopify.com/s/files/1/0443/0381/0716/files/protter_morrey_calculus_analytic_geometry.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_off000095ed.bin
d5fa41bd80938f69994a5bdbe74c7aa7b6ddda9b4dd68ed12aa0862ccb20e123		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95ED 5580 bytes
font_01_sfnt_off0000a8ed.bin
f8b4dc3a3250d6a689c7573c2b063b8e8783e711bfccbc46aaec79a7a640b4dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8ED 10640 bytes

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