Malicious PDF — malware analysis report

Static analysis result for SHA-256 abb51177f3724a39…

MALICIOUS

PDF

35.5 KB Created: 2020-08-17 17:39:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aa00772f9952cda106b0706fa9373434 SHA-1: fc9e492e4a8e7ca4421da941060d55160aff48f5 SHA-256: abb51177f3724a3984a7afcffb22f23a05145c3e78880fa75f6824b44c8d7414
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'ttraff.ru'. The document body, though heavily garbled, contains a URL that appears to be the same redirector, disguised as a quiz. The PDF also contains a large number of embedded links to external PDFs, many hosted on Shopify, which is characteristic of SEO link farm abuse. The primary malicious URL is used to redirect the user, likely to a phishing page or a site that initiates a further download.

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=organic+chemistry+functional+groups+quiz+pdf
    • http://mitorif.searlneuropsychology.com/uploads/1/3/0/7/130738797/tobaxedureti.pdf
    • http://files.sarahkbowen.com/uploads/1/3/1/4/131406036/da1fe720ed112bf.pdf
    • http://lazupij.lolas-ecec.org/uploads/1/3/1/8/131856772/783c0fb.pdf
    • http://tezebaja.chicinthewoods.com/uploads/1/3/1/4/131482952/wivagoxone_ronemi_gatenuja.pdf
    • https://cdn.shopify.com/s/files/1/0437/4321/5767/files/the_aud_club.pdf
    • https://cdn.shopify.com/s/files/1/0432/1175/1588/files/40261712927.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/firazesomepaxowikabubazif.pdf
    • https://cdn.shopify.com/s/files/1/0434/8513/5014/files/jidupuguxonixajolupiwego.pdf
    • https://cdn.shopify.com/s/files/1/0428/4517/5971/files/96049846160.pdf
    • https://cdn.shopify.com/s/files/1/0439/0790/7752/files/ni_no_kuni_2_seraphic_silk.pdf
    • https://cdn.shopify.com/s/files/1/0433/5458/7288/files/ti-_89_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/5456/3477/files/84240612073.pdf
    • https://cdn.shopify.com/s/files/1/0436/6876/6873/files/20691581993.pdf
    • https://cdn.shopify.com/s/files/1/0430/7465/0261/files/26368980489.pdf
    • https://cdn.shopify.com/s/files/1/0438/0341/0593/files/japarozizizilosu.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_off00004994.bin
2a9da5da9ecb800effe8a9d95acfe1ad645f36cd59960a797c56b03296a8632b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4994 5876 bytes
font_01_sfnt_off00005d66.bin
0eb67d2a73b80a8dade1049644693f1531d47e807b9e5bbf1051fea8f7b55d68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D66 10580 bytes

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