Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b899b7b0f1d31c…

MALICIOUS

PDF

42.3 KB Created: 2020-08-31 21:35:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18b4ac784639aa1b8a96e5c0fc5e6a1e SHA-1: 0f8b1f7101fb9973f3b898da5aaef956323a5e6d SHA-256: 02b899b7b0f1d31cb66d1884e6cebee6b9082cfaed222b4d03364ef368bef389
154 Risk Score

Malware Insights

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

This PDF file contains a link to a known malicious redirector, ttraff.com, disguised with text related to student worksheets. The document also functions as a link farm, pointing to numerous other PDFs hosted on Shopify. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam 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.com/pify?keyword=overtime+worksheets+for+students
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/99156923677.pdf
    • https://cdn.shopify.com/s/files/1/0430/3070/8385/files/rovaduzepetinekuvok.pdf
    • https://cdn.shopify.com/s/files/1/0430/8071/2346/files/chest_guidelines_anticoagulation_2016.pdf
    • https://cdn.shopify.com/s/files/1/0428/1984/6311/files/el_aparato_digestivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/pifuveni.pdf
    • https://cdn.shopify.com/s/files/1/0434/0000/3747/files/folobomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kenawuvotijogajutimev.pdf
    • https://cdn.shopify.com/s/files/1/0462/1418/5114/files/70013576906.pdf
    • https://cdn.shopify.com/s/files/1/0431/0925/3286/files/altium_designer_tutorial_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/dezosawivuzazigupigujo.pdf
    • https://cdn.shopify.com/s/files/1/0433/2696/3865/files/the_name_game_song.pdf
    • https://cdn.shopify.com/s/files/1/0438/9886/3771/files/matat.pdf
    • https://cdn.shopify.com/s/files/1/0437/8260/2904/files/57150332898.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_off0000679a.bin
f652c8182976cc3ec5ceb4b9e0c2ec5a9e73edc43a4ecda8ad1f0766fc8c030c
pdf-font-stream PDF embedded font (sfnt) at offset 0x679A 5148 bytes
font_01_sfnt_off0000790f.bin
f62476cb4a4d978c9a3c83bca5bfb70125c58bfe0f0c189c2e4d14a0a2f728af
pdf-font-stream PDF embedded font (sfnt) at offset 0x790F 10412 bytes