Malicious PDF — malware analysis report

Static analysis result for SHA-256 e80715654b3dd336…

MALICIOUS

PDF

46.2 KB Created: 2020-08-24 17:16:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd002396e6a4cafe8bd878311e3f09ab SHA-1: 687a9277f637afb018d6fe34251a7d2ada76bc8d SHA-256: e80715654b3dd33638df8c5788d50acb0dd71c7ab0bcec9caa419a693c963ecc
152 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, embedding numerous external links, with the primary malicious URL being https://ttraff.com/pify?keyword=oscillatory+reactions+pdf. The document body itself is largely unreadable binary data, but the presence of these numerous links strongly suggests a phishing or malware distribution 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=oscillatory+reactions+pdf
    • http://files.lunalaila.com/uploads/1/3/1/8/131856860/5547529.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/8845811040.pdf
    • https://cdn.shopify.com/s/files/1/0429/1349/7251/files/79618659204.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1130/files/xoxusezu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3603/3695/files/nipus.pdf
    • https://cdn.shopify.com/s/files/1/0432/1335/7211/files/here_comes_the_boom_nelly.pdf
    • https://cdn.shopify.com/s/files/1/0432/6129/6790/files/pdf_to_dxf_converter_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/0204/4316/files/guweperuwosulagazudogam.pdf
    • https://cdn.shopify.com/s/files/1/0440/8714/8709/files/tupodej.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000787f.bin
9acf8291c7fc13e42f7ca910d9ac3ba31087d61298d624b99e466f693a03ef73		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 5276 bytes
font_01_sfnt_off00008a7e.bin
8e2a1395ff3311c8c023c1606696115cd0dd85ce52caa55673001f487574ae38		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A7E 10000 bytes

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