Malicious PDF — malware analysis report

Static analysis result for SHA-256 367057b6991a7938…

MALICIOUS

PDF

45.0 KB Created: 2020-08-11 05:58:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16f2c425ce64216c9c863b16273bc431 SHA-1: 17bbed6b0f4918d01fb6721205f07d219baea5bf SHA-256: 367057b6991a7938a976af6e5e1f5133a9dd6ef17ada333efade45ef1a85b949
152 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for a 'coursebook PDF'. The primary malicious URL identified is ttraff.com, which is used to redirect users to other sites. The ML classifier strongly indicates 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=cambridge+international+as+and+a+level+business+studies+coursebook+pdf
    • http://sagarijin.houseofgodusa1.com/uploads/1/3/2/6/132696323/fotinat.pdf
    • http://files.foundationsofadolescentministry.com/uploads/1/3/1/4/131408027/baligaxaxe.pdf
    • http://files.kfbca.com/uploads/1/3/0/7/130738823/xefimadaxutuluzam.pdf
    • http://files.whynotusmarketing.com/uploads/1/3/2/6/132682882/jaxumep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/81108552740.pdf
    • https://cdn.shopify.com/s/files/1/0433/3495/9256/files/rejevatorazawofuxamipud.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4885/files/xarorugivivetupiz.pdf
    • https://cdn.shopify.com/s/files/1/0441/2204/6616/files/gufunuzoxuzobukivuwejotas.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/89006213528.pdf
    • https://cdn.shopify.com/s/files/1/0430/1157/1865/files/where_are_fortnite_replays_saved.pdf
    • https://cdn.shopify.com/s/files/1/0428/8295/7478/files/xutosigowebopunexutodemi.pdf
    • https://cdn.shopify.com/s/files/1/0437/7581/9927/files/discord_tos_nsfw.pdf
    • https://cdn.shopify.com/s/files/1/0440/5238/1846/files/zisaruwijur.pdf
    • https://cdn.shopify.com/s/files/1/0431/6643/3429/files/27108864780.pdf
    • https://cdn.shopify.com/s/files/1/0431/8799/4792/files/femozuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5314/5495/files/dotogo.pdf
    • https://cdn.shopify.com/s/files/1/0432/3121/5780/files/76727472401.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/83775672199.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61411835552.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/
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/89006213528.pd

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686e.bin
1b53f3b3b01958ea36b5005a95566852666d59788a1fb934c438367ac72382bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x686E 5644 bytes
font_01_sfnt_off00007b96.bin
97559695ebae2795f7a1a9acb835f4217044510c3237dd327e1c36d8bfa76c68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B96 13072 bytes

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