Malicious PDF — malware analysis report

Static analysis result for SHA-256 13e2fe16fe4dfe64…

MALICIOUS

PDF

43.0 KB Created: 2020-08-11 04:49:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8e3bdb2d008b94cdd591f1098b5c8581 SHA-1: f5aa8dffb824caa5727d64e75a6bdad800629f09 SHA-256: 13e2fe16fe4dfe64a1f31639fceadfa222dec6e91f2b48a0c9afb47dfd570d7a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. A critical heuristic identified a redirector link to 'ttraff.com', which is known malicious infrastructure. The document body also contains the same malicious URL, indicating an attempt to lure the user to a potentially harmful site.

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=comprehensive+aphasia+test+manual+pdf
    • http://files.gaby-castro.com/uploads/1/3/0/7/130775635/damevupoxi.pdf
    • http://files.dbgs.org/uploads/1/3/0/7/130776218/1077271.pdf
    • http://files.mylittlebiblestudy.com/uploads/1/3/1/4/131437516/141a87f2e4f57.pdf
    • http://files.randolphhamptonfire.org/uploads/1/3/2/6/132695216/kogogoxebi_wowazosuzuz_botiwib_boriv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0636/9703/files/57095934279.pdf
    • https://cdn.shopify.com/s/files/1/0437/7798/2626/files/gavukujibixeruwalagor.pdf
    • https://cdn.shopify.com/s/files/1/0439/2108/0475/files/biggest_discord_server.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6332/files/soxinojodasejunerejujesor.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/vevogeziregiseganezum.pdf
    • https://cdn.shopify.com/s/files/1/0429/3502/5831/files/unilever_ghana_annual_report_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/43431137047.pdf
    • https://cdn.shopify.com/s/files/1/0437/7047/8746/files/50785777551.pdf
    • https://cdn.shopify.com/s/files/1/0428/2990/6079/files/72507752149.pdf
    • https://cdn.shopify.com/s/files/1/0428/6778/5884/files/77069107632.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66456909559.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/fokuxenowarutewel.pdf
    • https://cdn.shopify.com/s/files/1/0433/3817/0526/files/default_nginx_conf.pdf
    • https://cdn.shopify.com/s/files/1/0431/4827/9970/files/47533476979.pdf
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/laruxobo.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ae8.bin
3b4a06479ed561fc0aca1d36157cf709e697040de0cfc02699d9942d672a34cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AE8 5244 bytes
font_01_sfnt_off00007c94.bin
dc74b7f126e6689cc34b27c2c96305b90deea79627a90320857fad19eac025b6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C94 9940 bytes

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