Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a23a4e9789dd6c8…

MALICIOUS

PDF

51.0 KB Created: 2020-08-10 04:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c3d4ef1bb8961af228c355adc64e079 SHA-1: db8c85372f220c7b65fba80bf5d28c0cbe705f53 SHA-256: 1a23a4e9789dd6c8cf7484104680e41b452fbf861bdd7da2550c484c1b1d0874
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a critical heuristic indicating it contains links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous external links, many pointing to Shopify domains. The embedded URL `https://ttraff.com/pify?keyword=angulos+determinados+por+dos+rectas+paralelas+y+una+secante+pdf` is a primary indicator of malicious intent, likely serving as a lure or initial stage of a phishing attack. The ML classifier strongly supports the malicious verdict.

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=angulos+determinados+por+dos+rectas+paralelas+y+una+secante+pdf
    • http://files.4everinelectricdreams.com/uploads/1/3/2/7/132740564/97236ef5dcf.pdf
    • http://files.anjelicacolliard.com/uploads/1/3/0/8/130874067/0e265a4.pdf
    • http://files.splitdecisionimprovcomedy.com/uploads/1/3/1/4/131453950/b3ebb8611ac.pdf
    • https://cdn.shop
    • https://cdn.shopify.com/s/files/1/0433/3748/2405/files/57907965861.pdf
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/80459142348.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/669297692.pdf
    • https://cdn.shopify.com/s/files/1/0431/4952/5156/files/35042554309.pdf
    • https://cdn.shopify.com/s/files/1/0431/5702/9024/files/categories_of_art.pdf
    • https://cdn.shopify.com/s/files/1/0437/8935/3118/files/pujojidelexetilulobofiso.pdf
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/vugazopevofuropojike.pdf
    • https://cdn.shopify.com/s/files/1/0432/7053/7374/files/architecture_thesis_topics_list.pdf
    • https://cdn.shopify.com/s/files/1/0433/4357/7246/files/que_es_la_administracion_publica_paraestatal.pdf
    • https://cdn.shopify.com/s/files/1/0437/9305/5904/files/ryobi_weed_eater_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0431/3396/0341/files/zenasorepapiva.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_off0000704c.bin
97eeb1097d44121baa1b87fcef3f7dc26404d456152fe89333da21102338cc97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 5564 bytes
font_01_sfnt_off00008332.bin
e555edaed064a02fb67bca7c3a940110fe970b7130225a88086df39c4e1b8aa9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8332 11044 bytes
font_02_sfnt_off0000a71a.bin
584780b83d2b471c60ad56403b6c1b1ffad8e928be7c9b74e809276eb4de34d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA71A 16152 bytes

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