Malicious PDF — malware analysis report

Static analysis result for SHA-256 79d207d32153553e…

MALICIOUS

PDF

62.3 KB Created: 2020-08-28 07:32:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e69e8fcf19983cb747e076c6b3bd8274 SHA-1: 1589a1d20d14ac2b9344c0458c9d76ae5e22f173 SHA-256: 79d207d32153553e125cd9b0ce29f11bcdff893d651c1c79c2fb8f8908e241ff
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files, characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is used to obscure the final destination. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=brene+brown+call+to+courage+torrent', suggesting a lure related to the 'Brene Brown call to courage' torrent, likely to redirect users to malicious content.

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=brene+brown+call+to+courage+torrent
    • http://lotekodi.coryulechorus.com/uploads/1/3/1/6/131636719/lagupimuruti.pdf
    • http://files.helptakeaction.com/uploads/1/3/0/9/130969470/2521f58.pdf
    • http://veferajor.tskjesusfreak.com/uploads/1/3/2/6/132680835/noxezafipewodabofome.pdf
    • http://jesigobol.alfiesearthwork.com/uploads/1/3/1/4/131438684/1247e379.pdf
    • http://files.thecreativeflowstudio.com/uploads/1/3/0/8/130874286/denatepix_fexemafaweguwe_vewuro.pdf
    • https://cdn.shopify.com/s/files/1/0428/6801/5260/files/xuxitelagigikarofulesip.pdf
    • https://cdn.shopify.com/s/files/1/0437/4583/7208/files/15504486557.pdf
    • https://cdn.shopify.com/s/files/1/0431/3497/6149/files/35740881688.pdf
    • https://cdn.shopify.com/s/files/1/0434/7179/8436/files/black_body_radiation_definition.pdf
    • https://cdn.shopify.com/s/files/1/0443/9549/5590/files/6th_grade_math_decimals_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/29738429285.pdf
    • https://cdn.shopify.com/s/files/1/0429/8833/9361/files/5699237929.pdf
    • https://cdn.shopify.com/s/files/1/0463/1081/7954/files/11430173850.pdf
    • https://cdn.shopify.com/s/files/1/0434/3804/7384/files/android_pie_font_magisk_module.pdf
    • https://cdn.shopify.com/s/files/1/0434/5764/2648/files/99931364614.pdf
    • https://cdn.shopify.com/s/files/1/0443/1986/7036/files/daffynition_decoder_angles_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0918/files/zekepav.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6378/files/articulation_and_phonological_disorders_bernthal.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/1/0431/6587/

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008489.bin
072c8ff0d081972139e4a529f46b570cec5e0a0975aa18b2ff9c66a1723c8e2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8489 4904 bytes
font_01_sfnt_off00009556.bin
1d43ff75ac336cb24746bbfbff20ebf766d165e4df845b7d7c359ba93517b0c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9556 16280 bytes
font_02_sfnt_off0000c85d.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC85D 16204 bytes
font_03_sfnt_off0000dd8a.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD8A 4324 bytes

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