Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f3819e2fde6582…

MALICIOUS

PDF

101.5 KB Created: 2020-08-22 17:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cb235fc3758fc4ea6c7254cfdd328f07 SHA-1: 20219d65a1797a7d37932a55fba3e97c8c8320ba SHA-256: 79f3819e2fde6582912a6d31fac9a689161567ebd572fc16527f8f9b525958c8
152 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it points to known malicious infrastructure. The embedded URL 'https://ttraff.ru/pify?keyword=acquisitions+incorporated+5e+pdf+free' is likely intended to lure users into downloading further malicious content or to a phishing page. The ML classifier also strongly flagged this PDF as malicious.

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.ru/pify?keyword=acquisitions+incorporated+5e+pdf+free
    • http://ravasari.thejuanonjuanpodcast.com/uploads/1/3/0/8/130874153/3822960.pdf
    • http://vufojot.illica.com/uploads/1/3/0/9/130969634/mibugunoxew-metiwisujuburug-zorolokanet-zuvedawenopor.pdf
    • http://files.digitalxraypros.com/uploads/1/3/0/7/130739578/c6937752684b210.pdf
    • http://files.uptonemporium.com/uploads/1/3/1/4/131437671/burizula.pdf
    • https://cdn.shopify.com/s/files/1/0446/6681/4617/files/degree_of_comparison_of_adverbs_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0429/8850/3203/files/56236700619.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0995/files/animal_crossing_rainy_day_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0436/3111/6448/files/17918005925.pdf
    • https://cdn.shopify.com/s/files/1/0431/1141/5962/files/81005439866.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0902/files/18961351954.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/tomcat_users_xml.pdf
    • https://cdn.shopify.com/s/files/1/0428/8305/5782/files/34896076814.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/57926222344.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_off00014a6b.bin
770b601593a8aa0fcae3f796a94085b70ea33821196b4df688b469de44a0d304
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A6B 5356 bytes
font_01_sfnt_off00015caa.bin
525acf936d70c1a6abf04f279e93219beae0d759323a0386cb0e84d6357bffe5
pdf-font-stream PDF embedded font (sfnt) at offset 0x15CAA 14432 bytes