Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0948de4e2ba8869…

MALICIOUS

PDF

77.8 KB Created: 2020-09-02 02:15:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e783da768b8e9f7a9ea43adf8b0f1aa9 SHA-1: 18289f643b82053ea21ea2ae773500aaa8c1d892 SHA-256: d0948de4e2ba886900330996c1462f9c0c6c4b50b234754d766eb24a5590fa0f
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'https://ttraff.ru/wix?keyword=rock+slope+stability+pdf' is flagged as malicious. Additionally, the PDF exhibits characteristics of a link farm, with numerous external links, suggesting an attempt to distribute traffic or host 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/wix?keyword=rock+slope+stability+pdf
    • https://cdn.shopify.com/s/files/1/0427/7266/0390/files/67053127112.pdf
    • https://cdn.shopify.com/s/files/1/0462/3899/0485/files/vojetivetixuvipeka.pdf
    • https://cdn.shopify.com/s/files/1/0434/1386/4602/files/bebeluzuzetosufu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8961/6279/files/tabla_decimal_a_binario.pdf
    • https://cdn.shopify.com/s/files/1/0434/0216/6428/files/que_significa_ser_asertivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3232/files/diario_almirante_byrd.pdf
    • https://cdn.shopify.com/s/files/1/0432/3350/9534/files/42025496465.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/hubspot_buyers_journey_template.pdf
    • https://static.usrfiles.com/ugd/72b0e7_75deed7341274eaba3344b7778666ddf.pdf
    • https://static.usrfiles.com/ugd/f515ca_990ddd34a52a4672b97573e12753cb2f.pdf
    • https://static.usrfiles.com/ugd/3e87bf_63315ef13b034a84b697e1bc2a37fe1a.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3ccff3355c4b72882e361250503326.pdf
    • https://static.usrfiles.com/ugd/f4de5e_9aff6b87e6e8486787c582cb55a6f674.pdf
    • https://static.usrfiles.com/ugd/ee6100_9989b1b6468b46c48cc6eb8b507ef459.pdf
    • https://static.usrfiles.com/ugd/cc14e4_1afa5289ff38412192048d2e87e2f783.pdf
    • https://static.usrfiles.com/ugd/384ea4_03f83595f2bf4cddb47475e50fc136c6.pdf
    • https://static.usrfiles.com/ugd/585b1d_72de60f9921e4afcb1611fd7280a6a20.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41e.bin
18a018d99dbf998018b9d615a750f922361a05000de5fb97c27564bbdb84ba3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD41E 5368 bytes
font_01_sfnt_off0000e683.bin
cb7a7d694878d14f656d6f1398550ff34773a186b0bd6cda6ac565d2e7dade26		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE683 14720 bytes
font_02_sfnt_off00011517.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11517 16036 bytes

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