Malicious PDF — malware analysis report

Static analysis result for SHA-256 5866f1ff999e8fc8…

MALICIOUS

PDF

46.6 KB Created: 2020-08-23 22:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6c19cfa895a07ff9e40081261c3969e SHA-1: 7d15c2639001afbeeb22f63b99bee47d5e32b3dc SHA-256: 5866f1ff999e8fc8be2deda8c9c588e17ded15b08466a4df293dae1c3cb0d1e2
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Implementation plan project template' and the malicious URL itself. The ML classifier also strongly indicated maliciousness. The presence of a link farm heuristic suggests this PDF is part of a larger campaign to distribute malicious links.

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=implementation+plan+project+template
    • http://files.studioentitas.net/uploads/1/3/1/3/131398367/4502632.pdf
    • http://files.lisaraephotography.net/uploads/1/3/1/3/131381376/xesuridibumeti.pdf
    • http://dibopur.reciprocalminds.com/uploads/1/3/1/4/131453060/xujolawovaza_lotol.pdf
    • https://cdn.shopify.com/s/files/1/0430/0577/1927/files/sixipukusexa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8402/9854/files/4602358560.pdf
    • https://cdn.shopify.com/s/files/1/0439/1141/3912/files/99255046078.pdf
    • https://cdn.shopify.com/s/files/1/0429/3787/6639/files/certificate_borders_vector_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0576/9888/files/72633937351.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/81356261812.pdf
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/paratormonio_e_calcitonina.pdf
    • https://cdn.shopify.com/s/files/1/0436/0021/6232/files/16460432806.pdf
    • https://cdn.shopify.com/s/files/1/0459/8068/0359/files/following_directions_worksheets_for_middle_school_students.pdf
    • https://cdn.shopify.com/s/files/1/0431/7682/0890/files/87703909257.pdf
    • https://cdn.shopify.com/s/files/1/0433/9813/5966/files/bugatexuliripovivejutuxus.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_off00007b18.bin
6eafc318444fdeb1f01372826ae638528959e2b145d5b37c21b5ebf2bfd4d1f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B18 4912 bytes
font_01_sfnt_off00008bac.bin
ad358dd629006277775ab06336c9fa325fcf5e1621e2717084622c180293d566
pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAC 9852 bytes