Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aeca6ec8ed8c1b4…

MALICIOUS

PDF

34.9 KB Created: 2020-08-19 14:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c404a6e022e3246fdb3b32880f0c55bb SHA-1: 576c551fb8330bdfd643224e1c83795427889572 SHA-256: 8aeca6ec8ed8c1b45eff2be8837e2c6f3cda2ef5783cfe22648574a1435c117a
150 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a reference to the same URL, suggesting it's the primary lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains, likely for obfuscation. No scripts were extracted from this sample.

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=chill+out+chair+order+form
    • http://files.thepulsefromcandi.com/uploads/1/3/1/4/131483440/nukuzaju-kazisut-kenakovabuleg.pdf
    • http://nodizol.nalomelihoney.com/uploads/1/3/0/7/130738870/814929.pdf
    • https://cdn.shopify.com/s/files/1/0440/5549/4806/files/the_beautiful_names_and_attributes_of_allah_uthaymeen.pdf
    • https://cdn.shopify.com/s/files/1/0431/0800/8090/files/90499568802.pdf
    • https://cdn.shopify.com/s/files/1/0430/6924/3549/files/taresipo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7974/5192/files/mulebisikixu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6936/5654/files/two_way_street_book.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/bawub.pdf
    • https://cdn.shopify.com/s/files/1/0430/8385/8073/files/toputal.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ruxiwigujunoxowigoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/using_commas_in_a_series_worksheet.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_off00004b0b.bin
9d258afefacc98236da12349fb275c5383a11ea1d3ae828ba09541bc614c00a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0B 4988 bytes
font_01_sfnt_off00005bd8.bin
80524347bf63604744aee6b524976a02f2935122f874977a3e3ef58cc9664870		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD8 10312 bytes

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