Malicious PDF — malware analysis report

Static analysis result for SHA-256 159f7654684efb73…

MALICIOUS

PDF

41.3 KB Created: 2020-08-18 22:47:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd2dd37a1eba1f7bf8c823512f28c5c0 SHA-1: 3a5bbeb6c68551b0a51ac8adca5eda5c51b4ad0f SHA-256: 159f7654684efb732c79ad3389140b668fa358c79af1b54ac44ca34cdcacb9cf
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. It also exhibits characteristics of an MFA lure, suggesting an attempt to harvest credentials or session tokens. The document body contains the same malicious URL, reinforcing its role as a lure. No scripts were extracted, but the presence of embedded URLs and the MFA lure indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=gmail+emails+to+pst
    • http://files.napavalleycharterbus.com/uploads/1/3/1/0/131070367/9800303.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7014/4158/files/73317820601.pdf
    • https://cdn.shopify.com/s/files/1/0434/2136/8482/files/mitolobozepofomupoj.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/48133194358.pdf
    • https://cdn.shopify.com/s/files/1/0435/5883/0229/files/cub_cadet_ltx_1040.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5316/files/dekojexobepuvu.pdf
    • https://cdn.shopify.com/s/files/1/0435/5312/8612/files/9683969542.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/power_gear_parts_and_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/4624/8358/files/bufosaru.pdf
    • https://cdn.shopify.com/s/files/1/0433/2165/5464/files/unable_to_add_text_to_document.pdf
    • https://cdn.shopify.com/s/files/1/0434/6321/3209/files/46300344206.pdf
    • https://cdn.shopify.com/s/files/1/0438/0511/4528/files/agama_islam_sebagai_agama_rasmi.pdf
    • https://cdn.shopify.com/s/files/1/0436/1663/2994/files/suvufomixapobasepuzok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4486/4149/files/moviescounter_com_kabir_singh_movie.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_off000063bc.bin
babaf83e38c666a8e67afa87089876e9ea2f6b0b1fd6ede82c18b0b542c3e0ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63BC 4900 bytes
font_01_sfnt_off00007452.bin
eeafa52da01b6403aea0e60c9e390775b39306cee70239399e4b0f2f8229ccde		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7452 10592 bytes

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