Malicious PDF — malware analysis report

Static analysis result for SHA-256 d234440bd9b85b16…

MALICIOUS

PDF

45.1 KB Created: 2020-08-12 14:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c034779f08b615815269b3378058729 SHA-1: 3d839275f52bbea82c502e60118b06db850f5182 SHA-256: d234440bd9b85b1604c986a79b8fdb189ac6a23115d27424081527ac9ac901ab
152 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with many pointing to a redirector service (ttraff.cc). This suggests a link farm or redirection attack designed to obscure the ultimate destination of malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external links supports this assessment. No scripts were extracted, so the exact payload delivery mechanism beyond the redirection is not discernible from this sample alone.

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=lista+de+competencias+laborales+pdf
    • http://duwegom.christinezoppi.com/uploads/1/3/1/4/131453494/pexubiwozupemuz_meriseniferupik_jutizif.pdf
    • http://files.fortykes.net/uploads/1/3/1/6/131606984/bilutumuz_tasevapijilem.pdf
    • http://kivedi.penrithicepalace.com/uploads/1/3/1/3/131398097/xotuvaxezaxazaw-sitiloxo-nurige.pdf
    • http://files.corsetranch.com/uploads/1/3/1/0/131070888/tusawemevet-xumuzoju-penivoveg.pdf
    • https://cdn.shopify.com/s/files/1/0430/7537/1162/files/tezibabomuraxutofiw.pdf
    • https://cdn.shopify.com/s/files/1/0429/0487/9267/files/binubinifakivofubu.pdf
    • https://cdn.shopify.com/s/files/1/0436/4694/3392/files/6th_grade_vocabulary_list_with_definitions.pdf
    • https://cdn.shopify.com/s/files/1/0452/7511/9778/files/algebra_2_book_mcgraw_hill.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/bulofoxigavum.pdf
    • https://cdn.shopify.com/s/files/1/0431/8304/6813/files/artificial_intelligence_examples.pdf
    • https://cdn.shopify.com/s/files/1/0439/8376/5662/files/perisetuzuto.pdf
    • https://cdn.shopify.com/s/files/1/0435/3726/8900/files/adolf_hitler_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/25491333632.pdf
    • https://cdn.shopify.com/s/files/1/0430/4257/0401/files/tom_sawyer_test.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/50589872152.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/duzosukisumog.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7945/files/adjectival_phrases_worksheets.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_off00006eb1.bin
e5c0f1f7080b8d834b020c02cfd46b8def7f8c2e69b5ac93c5bb813017a07e68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB1 5384 bytes
font_01_sfnt_off000080da.bin
9758d1d0b7f4e66d6ab67ad63a5830b64d21909502e77a8742a71528ff87fa46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x80DA 11404 bytes

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