Malicious PDF — malware analysis report

Static analysis result for SHA-256 a324a4fe3a01288e…

MALICIOUS

PDF

46.1 KB Created: 2020-08-26 21:05:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d0850ec429710506b8954d7f4a4a64ac SHA-1: bc5250937be80a96295286a8b897d06d6ae3d314 SHA-256: a324a4fe3a01288ee1e764ef39784625e9e4be75b1c69160ef3d4fc07e7bda82
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing to 'https://ttraff.cc/pify?keyword=queens+college+step+test'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. 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.cc/pify?keyword=queens+college+step+test
    • http://files.pacificcoastpsych.com/uploads/1/3/0/7/130776031/b3516b70de4.pdf
    • http://files.thairicespoon.com/uploads/1/3/2/8/132814239/bbf631.pdf
    • http://nasudix.coinsmakecents.com/uploads/1/3/2/7/132712286/damifofulovavo.pdf
    • http://gufifik.cutonemath.com/uploads/1/3/1/1/131164250/pozos-ledogefu-goduxev.pdf
    • http://files.charlenevanbuiten.com/uploads/1/3/1/1/131163872/acdfe.pdf
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/guwusaduwo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/basic_electronics_questions_and_answers_for_interview.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/mario_kart_wii_mods.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/54440827626.pdf
    • https://cdn.shopify.com/s/files/1/0435/0076/5336/files/circle_of_life_2019.pdf
    • https://cdn.shopify.com/s/files/1/0441/1362/5240/files/pikatiminirizu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5242/5631/files/travelport_galileo_basic_course.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2623/files/cbrn_course_full_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/7422/3269/files/safe_work_method_statement_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/6108/4314/files/donurobujim.pdf
    • https://cdn.shopify.com/s/files/1/0433/0582/8520/files/fetegatigasibobilatipi.pdf
    • https://cdn.shopify.com/s/files/1/0439/2294/8251/files/rifamofegenepos.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_off000061a9.bin
60148f102d337687cd80468414df6e228d05fc8d15e036b5b6570d9c86a486e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61A9 4856 bytes
font_01_sfnt_off0000724b.bin
49ef11faec9c334950dc0112f7d684693f40626155a4c71cc7d9161975cee8c3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x724B 10592 bytes
font_02_sfnt_off00009678.bin
713933360072c9d59346590fad668f98c3603c6d2b72ed941ce85481f6af0b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9678 16060 bytes

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