Malicious PDF — malware analysis report

Static analysis result for SHA-256 560b1070b5218ab4…

MALICIOUS

PDF

37.2 KB Created: 2020-08-28 02:26:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9e713e0b6fe7b13e76c5e75c725af58 SHA-1: ba121d3eab72c48113f8977a668511c78203de62 SHA-256: 560b1070b5218ab4199f3490a34c2fc3c0b2eb6f5d058e496d69f3a49750cf88
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that appears to be a lure for exam answers. The document body, though heavily obfuscated, contains the same URL and text related to exam answers. The PDF also exhibits characteristics of a link farm, with numerous embedded links, many of which point to Shopify domains hosting other PDFs. The primary malicious URL is ttraff.club, which is used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.club/pify?keyword=examen+planea+2017+secundaria+respuestas
    • http://files.isawyournutsmommy.com/uploads/1/3/1/6/131606866/towujexeti-rerizonirewipor-nibuxexam-vozotasikubim.pdf
    • http://files.lisaellisonart.com/uploads/1/3/1/4/131406082/duwemurijajalilafubo.pdf
    • http://gonapinu.leadingedgeequine.com/uploads/1/3/2/6/132680835/9241252.pdf
    • http://files.nesmun20.com/uploads/1/3/1/4/131437956/fiboxidef.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5050/files/kapoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/3279/7599/files/kubovejobedadalububil.pdf
    • https://cdn.shopify.com/s/files/1/0436/8872/2597/files/kshatriya_names_wallpaper.pdf
    • https://cdn.shopify.com/s/files/1/0430/6573/7370/files/mirabipapowid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8837/1107/files/ontology_epistemology_and_axiology_in_qualitative_research.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2922/files/answer_2019_gear.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2515/files/59592631021.pdf
    • https://cdn.shopify.com/s/files/1/0433/8371/8042/files/impossible_quiz_answers_q41.pdf
    • https://cdn.shopify.com/s/files/1/0433/7346/1669/files/linuwivolunewudewiketem.pdf
    • https://cdn.shopify.com/s/files/1/0430/7235/6509/files/88763365964.pdf
    • https://cdn.shopify.com/s/files/1/0436/1145/5645/files/mukenuw.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2516/files/us_address_format_apartment.pdf
    • https://cdn.shopify.com/s/files/1/0435/5004/8420/files/61037172773.pdf
    • https://cdn.shopify.com/s/files/1/0438/4446/8901/files/sirilodaxizepowofik.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/
    • https://cdn.shopify.com/s/files/1/0435/5004/8

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000516f.bin
f4fafab788261295f7210bddad9c4e1db2056d5931a44d875a8442120b267e8c
pdf-font-stream PDF embedded font (sfnt) at offset 0x516F 5648 bytes
font_01_sfnt_off00006497.bin
0bfe4843492f62fdbeed85e770296d5487fb2c22ca0167c13c0c70aca62503c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 10664 bytes