Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b46793a9738cc06…

MALICIOUS

PDF

46.8 KB Created: 2020-08-17 01:07:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6661feb1ecc65ead3a8523d7b441654 SHA-1: 8fc492b6051250b564a1353fe4629154889d5601 SHA-256: 2b46793a9738cc060c99115618cecbdbc2458f18a58d97ed146c6357f81b57da
152 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text suggesting a lure related to free templates. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, likely for SEO manipulation or to host further malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/pify?keyword=free+template+for+wordpress
    • http://foxevope.wisefishworld.com/uploads/1/3/1/3/131379730/87e2e99da469993.pdf
    • http://nuvukiru.lashupbrowdown.com/uploads/1/3/1/3/131378850/gobifukalazonu.pdf
    • http://files.doziermath.org/uploads/1/3/0/9/130969825/zefodefiwo.pdf
    • http://files.vrugginks.com/uploads/1/3/1/3/131398479/984c25.pdf
    • http://runure.antiagingchoices.com/uploads/1/3/1/4/131408027/6106716.pdf
    • https://cdn.shopify.com/s/files/1/0431/3609/0273/files/kipib.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/matteo_bandello.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/44644938454.pdf
    • https://cdn.shopify.com/s/files/1/0429/8535/7463/files/real_train_mod.pdf
    • https://cdn.shopify.com/s/files/1/0432/9819/3573/files/terexifakoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6585/8455/files/60597312166.pdf
    • https://cdn.shopify.com/s/files/1/0427/9074/8316/files/73034377984.pdf
    • https://cdn.shopify.com/s/files/1/0434/7727/0692/files/59167697412.pdf
    • https://cdn.shopify.com/s/files/1/0433/3905/5253/files/neziwe.pdf
    • https://cdn.shopify.com/s/files/1/0430/6875/2023/files/wudilinefu.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/karifesiworesabasam.pdf
    • https://cdn.shopify.com/s/files/1/0431/9723/5363/files/vedoze.pdf
    • https://cdn.shopify.com/s/files/1/0427/8665/2316/files/wisevasum.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_off00007927.bin
89e2add31d4477a732e115009fae76910f2639b23ce63f21003527e5778117b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 5232 bytes
font_01_sfnt_off00008af0.bin
6a09857cb874c45c8b5cb9041c54c9a53fa89a4ec4420f6f34074f209b67b7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF0 10332 bytes

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