Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa9f50920ab9384…

MALICIOUS

PDF

42.8 KB Created: 2020-08-17 07:16:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6d359b84aff40a1fc09d3585434dd43 SHA-1: 5589e80a6f2dea6597a4cc43f7e008c5e7375dee SHA-256: daa9f50920ab938455278b36747c60eb32412dd60f06884ef75086b561891905
150 Risk Score

Malware Insights

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

The PDF file contains a link that redirects to a known malicious domain, ttraff.ru. This domain is part of a link farm and is flagged as a malicious redirector. The document body also contains the same URL, suggesting a lure to entice users to click on it. The presence of numerous external links, many hosted on Shopify, indicates a link farm designed for SEO manipulation or to distribute malicious 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.ru/pify?keyword=android+tv+box+app+for+movies
    • http://files.starplanappliances.com/uploads/1/3/1/6/131606672/bemotudisi_limurakeva_bufifidexi_bixazazunasixij.pdf
    • http://files.allereview.com/uploads/1/3/2/8/132815008/todenubokidabeg.pdf
    • https://cdn.shopify.com/s/files/1/0434/4479/7605/files/nami_build_lol.pdf
    • https://cdn.shopify.com/s/files/1/0429/9292/6883/files/95797020308.pdf
    • https://cdn.shopify.com/s/files/1/0440/7105/9608/files/bamuvixaja.pdf
    • https://cdn.shopify.com/s/files/1/0435/3694/1215/files/xefivoduxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7600/9622/files/61143932132.pdf
    • https://cdn.shopify.com/s/files/1/0447/9369/2326/files/differential_calculus_and_integral_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0438/6829/1227/files/xuvokujasigesozovot.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0090/files/6690469613.pdf
    • https://cdn.shopify.com/s/files/1/0439/0033/8331/files/10712643233.pdf
    • https://cdn.shopify.com/s/files/1/0433/8984/5654/files/32945346470.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_off00006aa3.bin
301dd3fd1b60ec515c6263fa7d55d7417a313b0737dbe139c14a73c16feba16b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6AA3 5412 bytes
font_01_sfnt_off00007cf9.bin
7c46614f61407eb138e13325ac69902bdf43be044d36312dac746ee3caa57fec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF9 9940 bytes

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