Malicious PDF — malware analysis report

Static analysis result for SHA-256 285235c166199a4b…

MALICIOUS

PDF

51.5 KB Created: 2020-08-27 17:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6f7395db0d8ff32128c603ce9425edb SHA-1: cebf66d9490019350fa9203595b3c533c2478ec3 SHA-256: 285235c166199a4b4cf70d13d653250328d527c71d12d1a77f3fe9e1589c31e4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm and a critical redirector link pointing to 'ttraff.com', which is known malicious infrastructure. The document body text, though partially garbled, includes the same search query as the redirector URL, suggesting a lure to a potentially malicious site. 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.com/pify?keyword=is+rodan+and+fields+lash+boost+safe
    • http://files.gealedra.com/uploads/1/3/1/4/131483002/7466409.pdf
    • https://cdn.shopify.com/s/files/1/0430/7373/2769/files/buffalo_bills_schedule_2019_printable.pdf
    • https://cdn.shopify.com/s/files/1/0440/4045/4294/files/english_phonetics_and_phonology_carr.pdf
    • https://cdn.shopify.com/s/files/1/0438/0635/9714/files/dosaronifuwerijupivuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/4610/9341/files/pakobidorefura.pdf
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/senaboneso.pdf
    • https://cdn.shopify.com/s/files/1/0450/1143/5670/files/chaotic_sword_god.pdf
    • https://cdn.shopify.com/s/files/1/0428/6332/9446/files/functional_occlusion_peter_dawson.pdf
    • https://cdn.shopify.com/s/files/1/0431/8960/0414/files/temorelisetono.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_off00007b9e.bin
bc7eb8c61a68b6cac017526fd6c4024fb85396700aa71d6277c315b1197be30a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9E 5072 bytes
font_01_sfnt_off00008cc5.bin
ccf35e3193b2c2cf0ce9ac02a0296425ac60dab199cb52e550685e20ecbf1e8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CC5 6088 bytes
font_02_sfnt_off00009c93.bin
f5c8941503e017f92414ab38542e6322ef3a1b0525d792d5720739275c42e2c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C93 10668 bytes

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