Malicious PDF — malware analysis report

Static analysis result for SHA-256 a668c8bf38188a44…

MALICIOUS

PDF

61.9 KB Created: 2020-08-17 05:27:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d610e2ab4a55f279a2b412c0465a7b37 SHA-1: 649fa579635173b2b85c8401052b4cd1bdaac575 SHA-256: a668c8bf38188a44b42d25cff69f329be7e4eb15a071e949c029a347acc7146e
152 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute malicious content or engage in SEO abuse. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ttraff.com/pify?keyword=mandatory+reporting+act+nt', is the primary indicator of malicious intent, likely serving as a lure for phishing or malware delivery.

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=mandatory+reporting+act+nt
    • http://files.nancyjardineauthor.com/uploads/1/3/1/6/131637853/puratimatakubuvuta.pdf
    • http://files.abideministryofarlington.org/uploads/1/3/2/6/132695575/2022476.pdf
    • http://vewuzog.andadavid.com/uploads/1/3/1/0/131070356/4dbb9450b813b6.pdf
    • http://nanipa.katieriffe.com/uploads/1/3/1/0/131070487/05c170753406.pdf
    • http://files.backwoodsbangshop.com/uploads/1/3/0/8/130814200/kukepez_vokalumiwe.pdf
    • https://cdn.shopify.com/s/files/1/0431/0161/8330/files/jodepogepagesobi.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/zixovowapulu.pdf
    • https://cdn.shopify.com/s/files/1/0439/9579/1518/files/8292507150.pdf
    • https://cdn.shopify.com/s/files/1/0431/6567/9776/files/nonit.pdf
    • https://cdn.shopify.com/s/files/1/0429/1641/3607/files/segifesaz.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/86019415672.pdf
    • https://cdn.shopify.com/s/files/1/0431/4189/0208/files/xutevirid.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9768/files/jodarogusek.pdf
    • https://cdn.shopify.com/s/files/1/0430/8621/7365/files/9288210515.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/drug_metabolism_and_pharmacokinetics.pdf
    • https://cdn.shopify.com/s/files/1/0440/6152/4118/files/life_selector_credits_hack_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/8355/4202/files/berlitz_english_level_10.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8003629611.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/ninolufowiseg.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_off0000a898.bin
76e9dbaf1a72f0753ad11e9dbecf9447c29b35f5a0e57622df0c5bbe7022c53c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA898 4924 bytes
font_01_sfnt_off0000b971.bin
c3706a98e8ec17fbfdcb1dd8f46656025ea9891938fa02ea203a891e634c729d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB971 10124 bytes
font_02_sfnt_off0000dc0d.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC0D 4324 bytes

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