Malicious PDF — malware analysis report

Static analysis result for SHA-256 930f960172dd56a0…

MALICIOUS

PDF

45.1 KB Created: 2020-08-19 04:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 324914e95e1839a3508c4f286b58006e SHA-1: b79e8547c43e8a489ea83f89fa6a159cccf72256 SHA-256: 930f960172dd56a0e6bee9f9babeabffb39e85397b9634bc4e745c938c1c89f4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.ru. The document body text, though partially obfuscated, includes the same title as the malicious URL, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly supports the malicious verdict.

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=fetch+your+news+fannin+arrest+report+2018
    • http://files.forouryouthfoundation.org/uploads/1/3/2/8/132815791/7997533.pdf
    • http://gokuvusij.perimetertherapy.ca/uploads/1/3/0/7/130775823/pabitepig.pdf
    • http://files.lbkkennel.com/uploads/1/3/0/8/130813536/tokuwipezijawik.pdf
    • http://zepozokev.georgiadavisdressage.com/uploads/1/3/1/0/131070450/48b1eeb6f21de99.pdf
    • http://sabavuxi.thesecretroombook.com/uploads/1/3/0/8/130814328/wubejaxodutuj.pdf
    • https://cdn.shopify.com/s/files/1/0437/0910/4279/files/integrator_op_amp.pdf
    • https://cdn.shopify.com/s/files/1/0429/3728/6815/files/fahrenheit_to_kelvin.pdf
    • https://cdn.shopify.com/s/files/1/0432/3006/8898/files/tuxetokafasof.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3229/files/73597671633.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5671/files/dark_soul_coc_server.pdf
    • https://cdn.shopify.com/s/files/1/0438/5384/0534/files/fisetawexizotagip.pdf
    • https://cdn.shopify.com/s/files/1/0431/0935/1575/files/39220112431.pdf
    • https://cdn.shopify.com/s/files/1/0435/9267/9582/files/fobotikenanedewu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6083/0116/files/wilururuxuluxomole.pdf
    • https://cdn.shopify.com/s/files/1/0437/3934/9146/files/angels_in_america_part_one_millennium_approaches.pdf
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/dorizajox.pdf
    • https://cdn.shopify.com/s/files/1/0435/9539/9325/files/budir.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006e9f.bin
8fff3d786439a5392a570ff5d6a4ca0414305a9812e18393d95eccb9bb17b9bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9F 5740 bytes
font_01_sfnt_off00008246.bin
eeeb075923a2409d3b2bec4504de311b0fb9a5ba93dc9388832cbd782a4e13be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8246 10800 bytes

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