Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d63fabbb1870080…

MALICIOUS

PDF

50.1 KB Created: 2020-08-09 16:13:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ac0ddba83f0d8a472a472dc0d02af6e9 SHA-1: b8cc018bda504917cc74633f0bb111b2e22cbec6 SHA-256: 8d63fabbb18700806299689f1e0e05cab1f5b9b1c6caa4b17a635e941bf7d319
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. This URL is part of a link farm designed to lure users by mimicking search results for PDF documents. The embedded URL is reconstructed as 'https://ttraff.ru/pify?keyword=effects+of+air+pollution+on+materials+pdf'. The ML classifier also strongly indicated maliciousness. The document body contains obfuscated text and embedded URLs, further supporting the malicious intent.

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=effects+of+air+pollution+on+materials+pdf
    • http://files.aheartfortheharvest.com/uploads/1/3/0/8/130814714/zasemafiwuru-tebipodigi-gexonazexaf.pdf
    • http://files.antoinescookieshop.com/uploads/1/3/1/6/131636726/b36d3e17ff72b9b.pdf
    • http://files.whaleroc.co/uploads/1/3/2/6/132695620/5880818f82.pdf
    • http://files.splashcitysoaps.com/uploads/1/3/1/8/131871740/5a18da.pdf
    • http://files.crazygirlscreate.com/uploads/1/3/0/7/130739646/vifafafus.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/78981081213.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/sotojelu.pdf
    • https://cdn.shopify.com/s/files/1/0429/2476/9436/files/tutakikonogaxupaxeferu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2602/2554/files/toreno.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/can_t_help_falling_in_love_uke_chords.pdf
    • https://cdn.shopify.com/s/files/1/0430/2569/4883/files/ponalojikowomomefo.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/pipabaxaxat.pdf
    • https://cdn.shopify.com/s/files/1/0437/2309/6216/files/87823304118.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/winiwojoruroxuda.pdf
    • https://cdn.shopify.com/s/files/1/0432/3622/9277/files/64118464734.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32773531818.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wakorijupomimenupe.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/jufivepuvovexasidufare.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cbb.bin
e8b65e47598c99135d5d7ae9a13616593e35e2a17b99b64f187512b51a828886
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CBB 5256 bytes
font_01_sfnt_off00008e83.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E83 1800 bytes
font_02_sfnt_off00009711.bin
ab2cf865fb3fcfb7d3c252682b8c7d4d600c21b7eb40301f6f02d5be9d8668bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x9711 10368 bytes