Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f459fa14ee97538…

MALICIOUS

PDF

54.6 KB Created: 2020-08-01 11:56:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f84e01c6a3183718797d56f6f90d5ace SHA-1: e4abafd19e5aabed2745d60b365bd970395cc419 SHA-256: 3f459fa14ee9753838ec3477ac0b46d19f40c2f25fca5b1b96a690bd318e5b6a
152 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. A critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=apple+bottom+jeans+song'. The majority of the embedded links point to Shopify domains, suggesting an attempt to obscure the malicious destination. 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=apple+bottom+jeans+song
    • http://files.pawsacupuncture.com/uploads/1/3/1/4/131453354/digikip.pdf
    • http://files.artworks-square-fair.com/uploads/1/3/1/8/131856270/pagexexipugenejoluzo.pdf
    • http://files.engagewithease.com/uploads/1/3/0/7/130739247/4447818.pdf
    • http://files.mastlestattoo.com/uploads/1/3/2/6/132683137/mivides-disodofelofifa.pdf
    • http://files.bryngwynict.co.uk/uploads/1/3/1/0/131070651/8ade2b24902.pdf
    • https://cdn.shopify.com/s/files/1/0440/6404/7269/files/29063132345.pdf
    • https://cdn.shopify.com/s/files/1/0432/5670/9288/files/82500479203.pdf
    • https://cdn.shopify.com/s/files/1/0429/7401/9740/files/zatud.pdf
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/20854844207.pdf
    • https://cdn.shopify.com/s/files/1/0437/5796/1374/files/vilajezozizedutawar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4831/files/sepegogo.pdf
    • https://cdn.shopify.com/s/files/1/0440/1109/4174/files/xonumopo.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/61214255227.pdf
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/nikorojukozuberikupegenop.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.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_off000081e8.bin
b452f2647cf9d94b05b843ebb4e572e41593373669926ca8e0158eeb9614cf56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81E8 5248 bytes
font_01_sfnt_off000093b1.bin
f93560c014098221639c878dfb760695a47bc3d7722a7fea1286aa9ebd52cb61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x93B1 10640 bytes
font_02_sfnt_off0000b838.bin
fb7b45e24c28c4473d0ca1c6410c593992d9a809009f9c41b5ae32c9142507dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB838 16120 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.