Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc95a652615f8544…

MALICIOUS

PDF

47.2 KB Created: 2020-08-01 23:26:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce71b9fadb71cb646f87092a52ca4399 SHA-1: adaa3dec3208e1381910048e60a89cce6273ef00 SHA-256: dc95a652615f85444d068ef5db079cf60751a77828b694dc460cff5a8b53eaab
152 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link pointing to 'ttraff.com', which is designed to lure users to further malicious content. The document also hosts a large number of external PDF links, many of which are hosted on Shopify, suggesting a link farm or SEO poisoning tactic to distribute malicious content. The ML classifier 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.com/pify?keyword=css+move+text+down
    • http://files.kristen-stone-the-writer.com/uploads/1/3/1/4/131453076/bumawi.pdf
    • http://files.northchannelnetwork.org/uploads/1/3/0/7/130775828/fawojajikuzonid.pdf
    • http://files.kathleenmitchellstudio.com/uploads/1/3/1/3/131383478/sunefaniluweres-wevinezalewiw-lonifizi-sidopuworuw.pdf
    • https://cdn.shopify.com/s/files/1/0428/3714/7811/files/bawof.pdf
    • https://cdn.shopify.com/s/files/1/0430/4325/8519/files/8894634765.pdf
    • https://cdn.shopify.com/s/files/1/0428/7135/7596/files/98123547378.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fofigez.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/jojarakeloposaladexogake.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6353/files/zijovarofukaposipaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/0078/1208/files/geradutaki.pdf
    • https://cdn.shopify.com/s/files/1/0431/6489/3344/files/nafesoleruf.pdf
    • https://cdn.shopify.com/s/files/1/0429/8267/0485/files/kinuvunesubalunekonizuri.pdf
    • https://cdn.shopify.com/s/files/1/0433/7300/2906/files/12006235510.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/95281131157.pdf
    • https://cdn.shopify.com/s/files/1/0428/5064/8223/files/64530886351.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006132.bin
f5eb52640278a9d871aadaf85e509c38ac268c49aaf5240e9a9dc26143d2f843		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6132 4616 bytes
font_01_sfnt_off000070df.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70DF 1800 bytes
font_02_sfnt_off0000796d.bin
ba88d811855a1826bf6a30a954659c95b5db2aef17664049f86e9898ad9cc8f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x796D 12304 bytes
font_03_sfnt_off0000a197.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA197 4324 bytes

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