Malicious PDF — malware analysis report

Static analysis result for SHA-256 0058e13c3a07bff1…

MALICIOUS

PDF

42.5 KB Created: 2020-08-24 10:00:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea7c93325498fbe72e621b459622b37f SHA-1: d15fade78873b72759538b3c36011c4b9d1a9916 SHA-256: 0058e13c3a07bff1124dc69dceba581e8a02b2016a76592724de0caf044bc2fb
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious due to its inclusion of a link farm, with multiple embedded URLs pointing to external resources. One critical heuristic flagged a direct link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=microsoft+word+brochure+template+mac'. The document body, though heavily obfuscated, also contains this URL, suggesting a deliberate attempt to lure users to a potentially harmful site. The presence of numerous other PDF links further supports the link farm attack pattern.

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=microsoft+word+brochure+template+mac
    • http://tudonawi.slamproject.org/uploads/1/3/2/6/132680813/c400b801158e.pdf
    • http://duzubata.applebypropertymanagement.com/uploads/1/3/1/4/131437121/6fab0d6b9d.pdf
    • http://kunuruku.breedengallery.com/uploads/1/3/2/7/132740829/7213947.pdf
    • http://files.thesilentseed.com/uploads/1/3/1/3/131380308/620a425a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/2511/0952/files/54154451374.pdf
    • https://cdn.shopify.com/s/files/1/0430/3729/4741/files/37744153235.pdf
    • https://cdn.shopify.com/s/files/1/0435/3730/1653/files/taputararaxizogijonusi.pdf
    • https://cdn.shopify.com/s/files/1/0454/8014/9144/files/inorganic_chemistry_books_for_iit_jee.pdf
    • https://cdn.shopify.com/s/files/1/0432/4828/7912/files/31932512680.pdf
    • https://cdn.shopify.com/s/files/1/0465/5045/0326/files/tesatorexenolaxeta.pdf
    • https://cdn.shopify.com/s/files/1/0434/0026/5878/files/bee_spiritual_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/6410/5886/files/sazove.pdf
    • https://cdn.shopify.com/s/files/1/0432/6657/2452/files/zavukuriwukeviradaviremof.pdf
    • https://cdn.shopify.com/s/files/1/0434/4017/7317/files/vubidozamajetupumof.pdf
    • https://cdn.shopify.com/s/files/1/0436/7882/6661/files/bitrix24_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0435/2458/7672/files/45246827015.pdf
    • https://cdn.shopify.com/s/files/1/0432/6978/3720/files/1671194969.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067f0.bin
98025ee10a8c2662bef029653d2e4160c8fd3242c580d026732addc2e0527b8f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F0 5632 bytes
font_01_sfnt_off00007afd.bin
0a5175c66e2d82ccdde9c2578aa2edf50745320b5b255655f7be8b152254b1ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AFD 9836 bytes

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