Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb717df7f475756…

MALICIOUS

PDF

53.9 KB Created: 2020-08-27 18:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fae224fda5d56d86e39b3be404d7e6df SHA-1: 0b6ad5318e6232fa0cd52ce9c9ca4dc78dd483b1 SHA-256: 0bb717df7f4757566fd7db5ef5438ba5e4a9f0376377ece7eed3d675d6584d6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely the primary malicious objective. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing its role as a lure. No scripts were extracted, but the presence of embedded URLs and the malicious redirector strongly indicate a phishing or redirection attempt.

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=encuentros+maravillosos+capitulo+4+answers
    • http://xuralo.38plus2productions.com/uploads/1/3/1/3/131398177/nejuwisugobad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6633/4111/files/xibevapinupenabuwupod.pdf
    • https://cdn.shopify.com/s/files/1/0438/7989/1099/files/business_communication_thomas_means.pdf
    • https://cdn.shopify.com/s/files/1/0428/8577/5519/files/favip.pdf
    • https://cdn.shopify.com/s/files/1/0428/6903/1078/files/9783741022.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/boxilevito.pdf
    • https://cdn.shopify.com/s/files/1/0459/8867/5751/files/luponaporasaj.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/vinapegibikadiro.pdf
    • https://cdn.shopify.com/s/files/1/0432/0709/8529/files/bob_cheque_book_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/castellan_physical_chemistry_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/0757/3149/files/44269073698.pdf
    • https://cdn.shopify.com/s/files/1/0435/7154/4225/files/zerodha_varsity_technical_analysis_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/tivexiratifekenujokod.pdf
    • https://cdn.shopify.com/s/files/1/0429/6110/9155/files/read_one_piece_873.pdf
    • https://cdn.shopify.com/s/files/1/0437/7447/6440/files/88801514929.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://www.nytimes.com/2014/12/28
    • 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_off00008679.bin
1afdf5bc3ebc9af1f888c2bdfad7e700a9682a17581434647afb7a83c82d4b22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 5276 bytes
font_01_sfnt_off00009869.bin
fff82e267d77bb4ebf3428692a7f00edc8235036b73a5c826864c6621ab4daed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9869 16120 bytes

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