Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3c81f361cc76ab…

MALICIOUS

PDF

38.7 KB Created: 2020-08-23 18:49:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e193d922260877846505c3c2541c2335 SHA-1: 555520bdcd426a58aef8aaef8507e4663f31c807 SHA-256: ef3c81f361cc76abe7e624444d52efa090c0c24f5e573dd7297eef18f9a5c52b
154 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to mimic search results, specifically for the movie 'Bin bulaye baraati movie 300mb'. The primary malicious URL, https://ttraff.cc/pify?keyword=bin+bulaye+baraati+movie++300mb, is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to this movie and the malicious URL, indicating a lure to a potentially harmful site. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=bin+bulaye+baraati+movie++300mb
    • http://zululiki.westhay.com/uploads/1/3/1/4/131407406/kunipovedawu_fudetu_rodusa_napuwarizelafaw.pdf
    • http://lasovezi.61percent.uk/uploads/1/3/0/7/130775085/4197878.pdf
    • http://files.lisaglauer.com/uploads/1/3/1/4/131453684/26814bdd2b0.pdf
    • http://files.wgdairysupply.com/uploads/1/3/0/9/130969985/bekukuxulodop_jakomu.pdf
    • http://shurll.com/9nu8vShow
    • https://cdn.shopify.com/s/files/1/0432/1610/9736/files/navogafapuluwu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7410/1160/files/rinufemidikipituwotawiwi.pdf
    • https://cdn.shopify.com/s/files/1/0447/8841/6663/files/a_scan_biometry.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/tukafasewawekazexuxu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7180/7396/files/new_jersey_magisterial_district_court_docket_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/2997/8526/files/kibudezanuxufijagewe.pdf
    • https://cdn.shopify.com/s/files/1/0430/2677/6227/files/74885751300.pdf
    • https://cdn.shopify.com/s/files/1/0433/4390/4927/files/the_nose_by_nikolai_gogol_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0433/6897/2444/files/likixujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/sap_implementation_guide_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5317/0339/files/septoplastia_e_turbinectomia.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005826.bin
787489e39a7aee5d6b55ad267c4b1ccedf9c2e945d19cc470b03de188ff0da27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5826 5308 bytes
font_01_sfnt_off00006a2c.bin
07295afb17d0b37cc4437576cef728eaf383ce382d424e59441c59399e8d02d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2C 10536 bytes

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