Malicious PDF — malware analysis report

Static analysis result for SHA-256 016a1060c1009bee…

MALICIOUS

PDF

41.3 KB Created: 2020-08-13 01:55:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e57e6b7292c519412b9ac776451380d3 SHA-1: 78fb660c49de8db8051881fef532a4ec51d430fd SHA-256: 016a1060c1009bee36a1b6134ed72cc6fa7ae8821dc73261cce6058ba14862e8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes the target URL, suggesting a social engineering attempt to direct users to malicious content. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=c+programming+including+numerical+and+statistical+methods+pdf
    • http://files.scottafleming.net/uploads/1/3/1/8/131857305/4995369.pdf
    • http://files.crimsonsoccer.us/uploads/1/3/1/4/131407709/megupoma.pdf
    • http://files.countrygiftandthrift.com/uploads/1/3/0/8/130813364/xevobaxikufa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1945/2063/files/10951340131.pdf
    • https://cdn.shopify.com/s/files/1/0433/0579/5752/files/bagapepamapok.pdf
    • https://cdn.shopify.com/s/files/1/0432/5448/1058/files/68380996015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/deved.pdf
    • https://cdn.shopify.com/s/files/1/0431/9651/4461/files/18342428297.pdf
    • https://cdn.shopify.com/s/files/1/0431/1223/5159/files/runonujafepukubarakut.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/23978023846.pdf
    • https://cdn.shopify.com/s/files/1/0432/0909/7376/files/venezukavituboj.pdf
    • https://cdn.shopify.com/s/files/1/0430/5531/7149/files/84515127538.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/children_john_santrock.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/zoturuzer.pdf
    • https://cdn.shopify.com/s/files/1/0448/2033/2705/files/vitisuxavezeg.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004d89.bin
1bf2e16dd6fea9163e1cf7b5e2d5421c3e17d5b79b9f6517245bca4d4dfdaeb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4D89 5476 bytes
font_01_sfnt_off00005ff3.bin
5e0d518dcf12c1f5aa33772b1446a4f0dd7b5e3f0ea2b94b68f2ea0d5c9444d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF3 10012 bytes
font_02_sfnt_off00008272.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8272 16164 bytes

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