Malicious PDF — malware analysis report

Static analysis result for SHA-256 03393d91fd0da39c…

MALICIOUS

PDF

43.0 KB Created: 2020-08-10 07:39:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52b88c3a5bfd4397377301c3da39e8bb SHA-1: 364c2039fbfbde8e1409a32ff34c9df10f5cd7b5 SHA-256: 03393d91fd0da39cc7841a7aa4566d2375b5f1589ea5783f83a382aa3a2e305d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, with one specifically pointing to a known malicious redirector at 'ttraff.com'. The ML classifier also strongly indicated maliciousness. The document body, though malformed, contains the same suspicious URL, suggesting an attempt to lure users to malicious content. The presence of multiple Shopify links, while some are benign, could be part of a link farm to obscure the malicious destination.

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.com/pify?keyword=life+beginner+teacher+s+book+pdf
    • http://files.dbptraining.com/uploads/1/3/0/9/130969322/4853001.pdf
    • http://files.audreysaxton.com/uploads/1/3/1/8/131871484/mifir.pdf
    • http://files.soapfactory.tv/uploads/1/3/0/7/130739618/gagejinaxa.pdf
    • http://files.theastorz.com/uploads/1/3/2/6/132683154/namoze_vupazi.pdf
    • http://files.catacomb-records.uk/uploads/1/3/0/8/130813588/dc8638c1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/71020264157.pdf
    • https://cdn.shopify.com/s/files/1/0431/9775/9643/files/60747584004.pdf
    • https://cdn.shopify.com/s/files/1/0430/9801/3863/files/tusoguronovewo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/jevizo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7274/9721/files/jetudusosojitat.pdf
    • https://cdn.shopify.com/s/files/1/0433/2450/6266/files/bofafevaluwedofase.pdf
    • https://cdn.shopify.com/s/files/1/0431/2642/3701/files/zikafogutiverikoposi.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/fogelugiwumedepezido.pdf
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/63399143357.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/6338597663.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/megan_leavey_123movies.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1159/files/revigoradu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006708.bin
18c0631296236f628096471eb0a795ad49157bb78a47876bb07749445766a0df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 5528 bytes
font_01_sfnt_off000079d0.bin
72e61504dcd7fcaef482cc6e67695f3129c1f95459b1c9c7fbd184e7c7ab7e1e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79D0 10708 bytes

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