Malicious PDF — malware analysis report

Static analysis result for SHA-256 7156e740ec248558…

MALICIOUS

PDF

64.9 KB Created: 2020-08-17 01:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60ccd51c44791e2c4667ef3b7ecedfe7 SHA-1: a73682bf1088437c8481ba5d4eb8cda7417b5f35 SHA-256: 7156e740ec248558805a63fa772ac02e4cdd11c0b9f2db1efa6d4678875ab93e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a malicious redirector. The document body, though heavily obfuscated, includes a URL that appears to be part of a link farm designed to drive traffic to malicious infrastructure. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

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=contract+closeout+report+template
    • http://files.2003ebaenglandscotlandtrip.com/uploads/1/3/1/6/131637308/vokosifavovanolopar.pdf
    • http://fapaj.jobarber.com/uploads/1/3/1/0/131070420/98514d4ee400.pdf
    • http://files.crossfitgk.com/uploads/1/3/1/4/131453821/071711.pdf
    • http://tanetadeb.paper-scraps.com/uploads/1/3/1/4/131437604/988aa2950.pdf
    • http://files.downtownbhamplan.com/uploads/1/3/1/4/131406082/vipiximifulo.pdf
    • http://fontawesome.iohttp://fontawesome.io/license/
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4116/0344/files/1337035876.pdf
    • https://cdn.shopify.com/s/files/1/0434/3991/5164/files/86356658162.pdf
    • https://cdn.shopify.com/s/files/1/0430/6740/8535/files/dusokesun.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2443/files/wigaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/3882/6918/files/govatij.pdf
    • https://cdn.shopify.com/s/files/1/0431/4005/5208/files/tratamiento_candida_hombres.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/matlab_code_for_beamforming_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/xotomumotaxugozemeliroz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/27808697679.pdf
    • https://cdn.shopify.com/s/files/1/0427/9622/0572/files/41824637929.pdf
    • https://cdn.shopify.com/s/files/1/0434/8346/3832/files/zerebiwivorilulaxaxefad.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a630.bin
071e35b4774d226c89bbd10bef30110ecb094d3555517f0e29a727a4cc4785e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA630 1728 bytes
font_01_sfnt_off0000ae4b.bin
aac6cadbe635c2989906064547f498c935915e1f90d6f3a614c0033e95b287cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE4B 4984 bytes
font_02_sfnt_off0000bf1d.bin
54b7ea7e513d799792aee59eb51eeeb4fb58e8221504d4e4dc7d29cdf42aa03b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF1D 17100 bytes

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