Malicious PDF — malware analysis report

Static analysis result for SHA-256 a546dd955fab1a1f…

MALICIOUS

PDF

105.2 KB Created: 2020-08-08 00:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f0f5b85ce4724875880cd8c77bbba826 SHA-1: c8ea1c187aee18187b7977b7c8f591780710778e SHA-256: a546dd955fab1a1f3dc65569e3fd4d089e1ec677f059f9f6a7c6bd65a725edf7
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, pointing to 'https://ttraff.ru/pify?keyword=non+verbal+communication+examples+pdf'. This indicates the document's primary purpose is to redirect users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL and the PDF structure strongly suggest a phishing or redirection attack.

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=non+verbal+communication+examples+pdf
    • http://files.perryyoungblood.com/uploads/1/3/2/8/132814958/0ea5aef1c75.pdf
    • http://files.sharaimage.com/uploads/1/3/1/0/131070407/pozaxan.pdf
    • http://files.chqchurches.net/uploads/1/3/2/6/132681343/kedadawuzevip.pdf
    • http://files.lizarios.com/uploads/1/3/1/4/131406797/bixenigevaj.pdf
    • http://files.makingwithwords.com/uploads/1/3/0/7/130740458/9171262.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45035229099.pdf
    • https://cdn.shopify.com/s/files/1/0431/8432/4770/files/49217749033.pdf
    • https://cdn.shopify.com/s/files/1/0429/9898/8954/files/zexufubuwikusop.pdf
    • https://cdn.shopify.com/s/files/1/0433/9993/8211/files/routing_algorithms_in_computer_networks_lecture_notes.pdf
    • https://cdn.shopify.com/s/files/1/0434/4968/0032/files/34644560248.pdf
    • https://cdn.shopify.com/s/files/1/0441/2496/2968/files/music_crossword_puzzles.pdf
    • https://cdn.shopify.com/s/files/1/0432/5385/8472/files/lidazalimevikeluse.pdf
    • https://cdn.shopify.com/s/files/1/0454/6691/0872/files/bsnl_broadband_plans_kerala.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9051/files/medanunugopimiba.pdf
    • https://cdn.shopify.com/s/files/1/0430/9201/7305/files/68916309873.pdf
    • https://cdn.shopify.com/s/files/1/0431/5296/5792/files/matogizufufokixajolar.pdf
    • https://cdn.shopify.com/s/files/1/0428/2518/7491/files/10418477021.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_off0001602b.bin
1d15e263bad552bc978994600d5832e71878c967f836b2dbb34cefe6f89afe02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1602B 5540 bytes
font_01_sfnt_off000172f0.bin
0f3cd9a22bc7d188b7d625e72fb62ee418005ee4dde44ee332345424a588d1bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x172F0 10584 bytes

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