Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4bb7c982fd598e…

MALICIOUS

PDF

54.2 KB Created: 2020-09-01 15:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1d9bdf0b9693a9db9a202247bb9c30a SHA-1: 06b416c3c7786edee25a15eb82c0138747a88b02 SHA-256: db4bb7c982fd598eb70fd850131c678ab337dcee1170342542185bdacab98a39
152 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, contains the same URL, suggesting it's the primary lure. The ML classifier also strongly indicated maliciousness. The file is likely a phishing document designed to redirect users to a malicious 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.cc/wix?keyword=mp+online+exam+form+apsu+2018
    • https://static.usrfiles.com/ugd/e745be_82cf837c22aa4fbd9fe9195c46ba246c.pdf
    • https://static.usrfiles.com/ugd/5e81b9_9336f2390aa64422bce31163149ed569.pdf
    • https://static.usrfiles.com/ugd/d17951_f7591b9aa3c84c0d893064c4a4f1d29e.pdf
    • https://cdn.shopify.com/s/files/1/0429/4482/3452/files/caliathletics_workout_plan.pdf
    • https://cdn.shopify.com/s/files/1/0445/3600/4767/files/how_to_cydia_impactor_on_windows.pdf
    • https://cdn.shopify.com/s/files/1/0429/4164/4963/files/20780784396.pdf
    • https://static.usrfiles.com/ugd/7f16bd_ea18992e1ca84ce1b7a5174092b8e3f5.pdf
    • https://static.usrfiles.com/ugd/ab059d_cd144a328d294f749f69105e8962bc33.pdf
    • https://static.usrfiles.com/ugd/a838c0_fc6d6dc9ebbd4c1ba0000e02e466179c.pdf
    • https://static.usrfiles.com/ugd/538d67_816fec90b757448ea97195c072f91f30.pdf
    • https://static.usrfiles.com/ugd/b8c837_12c70df8f6874c928cbe2bf06766e928.pdf
    • https://static.usrfiles.com/ugd/1f6d71_24e254cb4fa54cf0abf213cc87ebaf54.pdf
    • https://static.usrfiles.com/ugd/3794ad_de62d8fb581b48ac8b8968703ec101a0.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
stream_007_off0000b9d0.bin
1a8b0d913ef488a75dc901351eaaaf93ab4d49c6632f1d8d909c7ab703c3d63e		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0xB9D0 4772 bytes
font_00_sfnt_off000076f9.bin
bb2736a8aad81eb5ae3d39df9785648f7a39455474ced79a9b5e50eda335f622		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F9 5444 bytes
font_01_sfnt_off0000895e.bin
2a4271d237c4cbbd247d329e9ef8fed2de2022f1edd7a28bddda2e8e03cb5ad9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x895E 10080 bytes
font_02_sfnt_off0000abd0.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xABD0 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.