Malicious PDF — malware analysis report

Static analysis result for SHA-256 e68912f363f8b16c…

MALICIOUS

PDF

45.5 KB Created: 2020-08-08 02:33:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eade618cdb0a060428874ce14b9ffac1 SHA-1: 7562d91c2c5c285abb055f40ee63697f2522e15e SHA-256: e68912f363f8b16c873ae07966ecbed52c21d53fa9b028ca1480e0f76a7678cf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary malicious URL, 'https://ttraff.com/pify?keyword=decode+base64+to+pdf+javascript', suggests a lure related to technical manipulation to entice clicks. The document body, though heavily obfuscated, contains this URL and other links pointing to Shopify domains, some of which are confirmed benign while others are unknown. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent, likely to redirect users to a phishing or malware distribution 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=decode+base64+to+pdf+javascript
    • http://files.westendjiujitsu.com/uploads/1/3/1/6/131636689/1082198.pdf
    • http://files.simplyscrunchyeg.com/uploads/1/3/1/0/131070151/tujadevesugigogujuz.pdf
    • http://files.eastcoastspeedwaytv.com/uploads/1/3/0/7/130776673/laropuzaso_vakinulife_bitogazo_fojuvasusox.pdf
    • https://cdn.shopify.com/s/files/1/0432/4114/4483/files/57812217732.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/nepemezimulimasizaroba.pdf
    • https://cdn.shopify.com/s/files/1/0431/4375/7992/files/8915784211.pdf
    • https://cdn.shopify.com/s/files/1/0433/4324/9563/files/64949280722.pdf
    • https://cdn.shopify.com/s/files/1/0438/3241/0272/files/blink_182_discography.pdf
    • https://cdn.shopify.com/s/files/1/0436/2951/0814/files/business_card_creator.pdf
    • https://cdn.shopify.com/s/files/1/0435/6653/0719/files/accidentes_de_transito_en_el_peru.pdf
    • https://cdn.shopify.com/s/files/1/0438/7235/4459/files/catalina_island_fishing.pdf
    • https://cdn.shopify.com/s/files/1/0432/4684/6107/files/kifow.pdf
    • https://cdn.shopify.com/s/files/1/0443/9392/2726/files/adobe_printer_queue_not_clearing.pdf
    • https://cdn.shopify.com/s/files/1/0437/3748/1365/files/widuxedeje.pdf
    • https://cdn.shopify.com/s/files/1/0429/7683/7785/files/lotexamugozuvavobifeduzo.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/kfor_weather_radar.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_off000065bd.bin
5f719a7fe8aea701c5dbb1ed898d2203c3d2d60236b0d08855dad04a719978ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65BD 5316 bytes
font_01_sfnt_off000077f4.bin
c88d3835c851c01973a95c38e2a362679fdb7502150940f0c398184ea2cb704a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77F4 10128 bytes
font_02_sfnt_off00009aac.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AAC 4324 bytes

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