Malicious PDF — malware analysis report

Static analysis result for SHA-256 752dd0adaf303808…

MALICIOUS

PDF

33.7 KB Created: 2020-08-11 04:05:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9b9e85e1b6fb2836d2034dd4e487fcb SHA-1: 9167c29c54d80b938ff79b6db8ebac9c7fa4bed5 SHA-256: 752dd0adaf303808ad83a0693740358bd20347ae3aad8137282b141581679ed3
154 Risk Score

Malware Insights

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

The PDF contains numerous links, including one to a known malicious redirector at `https://ttraff.com/pify?keyword=candlestick+patterns+pdf+sinhala`. This suggests the document is part of a link farm or phishing campaign designed to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

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=candlestick+patterns+pdf+sinhala
    • http://files.wkuprecollegepiano.com/uploads/1/3/0/7/130739508/xapula.pdf
    • http://files.shrubmadness.com/uploads/1/3/0/7/130775561/kefez.pdf
    • http://bivewonek.madridistasatl.com/uploads/1/3/1/8/131871991/kuwuk-jisugibafuvuni-furuwutif-muzanubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4077/5064/files/form_130_u.pdf
    • https://cdn.shopify.com/s/files/1/0433/0822/0574/files/42164211391.pdf
    • https://cdn.shopify.com/s/files/1/0433/5462/0054/files/crandon_park_beach.pdf
    • https://cdn.shopify.com/s/files/1/0435/8068/6491/files/6627938419.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8711/files/44241682422.pdf
    • https://cdn.shopify.com/s/files/1/0434/3431/1845/files/sijumak.pdf
    • https://cdn.shopify.com/s/files/1/0447/9565/8389/files/degusutaxetajapul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/75905164962.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/bagiwib.pdf
    • https://cdn.shopify.com/s/files/1/0438/1478/1085/files/adobe_packages.pdf
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/berliner_platz_1_neu_lsungen.pdf
    • https://cdn.shopify.com/s/files/1/0450/8683/4851/files/86768931021.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_off000048a5.bin
f1c5e7eb4da799336b1cc199d3a0eb783c810148b72b7efbbb45caaa8f5b3824
pdf-font-stream PDF embedded font (sfnt) at offset 0x48A5 5212 bytes
font_01_sfnt_off00005a55.bin
474f929e12577bced3d95ba736382844a86f899ec19529dabdef2166c9cfdd52
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A55 9284 bytes