Malicious PDF — malware analysis report

Static analysis result for SHA-256 e427a4697ecfcda4…

MALICIOUS

PDF

56.5 KB Created: 2020-08-06 00:15:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: af0fa2f9196af31b1459f62f389bb52f SHA-1: 9abfb3b920436bc759d76754c053fbe2838b78ca SHA-256: e427a4697ecfcda43b3bc414279f6cc5af8cc4668eb2645ed3ac5969d248a0f6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many of which are benign Shopify URLs. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to lure the user to a compromised site.

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=cavite+mutiny+tagalog+version+pdf
    • http://pavivun.thinkingthroughdrawing.org/uploads/1/3/0/7/130738970/pakusatepedawaluxe.pdf
    • http://files.middletonandnewbigginparishcouncil.org/uploads/1/3/0/9/130969140/2e6e56e680.pdf
    • http://files.alexferguson.co/uploads/1/3/1/3/131398099/ludekoruxara-siferobubow-gexebofi.pdf
    • http://files.roscoebarnes.net/uploads/1/3/1/4/131453436/pawiwazasiladas.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4241/files/what_is_street_address_example.pdf
    • https://cdn.shopify.com/s/files/1/0436/3943/9510/files/french_to_english_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9781/files/dowuwunuxowoz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/voxodawetifudixivad.pdf
    • https://cdn.shopify.com/s/files/1/0431/0974/4789/files/eq_paladin_spells.pdf
    • https://cdn.shopify.com/s/files/1/0432/2990/5058/files/kijebuguvaruroserugawa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8180/1629/files/19872928050.pdf
    • https://cdn.shopify.com/s/files/1/0428/6113/3990/files/marojabonafuzajuraze.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/famijefujilevox.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tiwimuz.pdf
    • https://cdn.shopify.com/s/files/1/0435/2396/5079/files/minecraft_direct_connect.pdf
    • https://cdn.shopify.com/s/files/1/0433/7968/7574/files/kirurumasavog.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_off000091c2.bin
6ff46673cfa7bcbe160e13fd83f0c80c653443fe841fee4de9b094a4f00552ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x91C2 5428 bytes
font_01_sfnt_off0000a43a.bin
1a2c44c4f49ba998cbf8adc2b8a56f07103b907aacad9b0e3cfba555dd54af9a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA43A 10120 bytes
font_02_sfnt_off0000c6e4.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378
pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E4 4324 bytes