Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e664a7f32292e7…

MALICIOUS

PDF

63.1 KB Created: 2020-08-18 17:59:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 428d02ea07871a90b413a96b7fce4a82 SHA-1: c7894e88878fae77a2c93ef8168ee46103b5f0ce SHA-256: 67e664a7f32292e7da6af630e12918a2e750d22b9a33ed59735b6ff158c9a1e7
154 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'https://ttraff.ru/pify?keyword=naming+amines+worksheet+with+answers'. The document body, though heavily obfuscated, contains references to this URL and appears to be a lure disguised as an educational worksheet. The presence of numerous external PDF links further suggests a link farm or redirection attempt, likely for phishing or malware delivery.

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=naming+amines+worksheet+with+answers
    • http://files.dynamogymclub.ca/uploads/1/3/2/6/132681891/pofidaw_duxago_lidinewotonose.pdf
    • http://tatof.dorothyfreed.com/uploads/1/3/1/4/131437252/4b9f41.pdf
    • http://gigom.mattjonesfiction.com/uploads/1/3/2/6/132695399/darekekoderonojuvap.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/2764/5084/files/pulebor.pdf
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/48969068118.pdf
    • https://cdn.shopify.com/s/files/1/0432/6470/4662/files/xuduxatupujagejojoju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0430/7307/7409/files/bluetooth_mic_application_for_android.pdf
    • https://cdn.shopify.com/s/files/1/0433/3201/0152/files/gunujapuxitevibupume.pdf
    • https://cdn.shopify.com/s/files/1/0431/3923/5997/files/24753105594.pdf
    • https://cdn.shopify.com/s/files/1/0436/8482/3205/files/gokadilixixogenekase.pdf
    • https://cdn.shopify.com/s/files/1/0437/4659/0872/files/belgarath_the_sorcerer_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/7913/0531/files/59026683860.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad29.bin
4aba2bb845853324476be69e5ed1bf4ff35002942389efac2b843cac1129f0e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD29 2828 bytes
font_01_sfnt_off0000b724.bin
a749c92a0823115481ebdc500a9111b9efd3280fd761e6b7b8d0bd3b141f3f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB724 5192 bytes
font_02_sfnt_off0000c8b9.bin
507e13f8c8b129899ac9eefcdb0975590a79face9c0d0d7d83fcad4de6c29185		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8B9 11604 bytes

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