Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdfe7724c9a993ce…

MALICIOUS

PDF

47.7 KB Created: 2020-08-18 19:42:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82100440120f69202538d4d16f3f522e SHA-1: 57473be7a1ffc3e28d5f9885eb18dbd4f95f4581 SHA-256: cdfe7724c9a993ceac3e8c4c8338d6d6f4c9fb3c33159cf10af02ce3c408b98b
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, many of which point to external PDF files hosted on various domains, suggesting a link farm or redirection strategy. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com', which is presented in the document body as an answer key for 'triangle congruence theorems'. This indicates a social engineering attempt to direct users to malicious content. No scripts were extracted, limiting the analysis of further payload delivery or execution.

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.com/pify?keyword=triangle+congruence+theorems+answer+key
    • http://xiwovu.sccwestcovina.net/uploads/1/3/2/7/132710780/0f2d197.pdf
    • http://banud.lolaandco.com.au/uploads/1/3/0/7/130776741/7178953.pdf
    • http://files.montdeoliviersleglisededieu.com/uploads/1/3/1/1/131163733/nojukaxufudisagiko.pdf
    • http://files.accessibleveganadventures.com/uploads/1/3/2/7/132740665/gulutomupor.pdf
    • http://files.artstorechicago.com/uploads/1/3/1/4/131437834/a888574664ac.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/91169488231.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/93861148098.pdf
    • https://cdn.shopify.com/s/files/1/0435/3464/7460/files/57634319252.pdf
    • https://cdn.shopify.com/s/files/1/0436/5929/6926/files/rooms_of_the_house_worksheets_for_kindergarten.pdf
    • https://cdn.shopify.com/s/files/1/0439/0053/4952/files/lukiriminegusuzeped.pdf
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/wuxokudaxikawojopefiwunul.pdf
    • https://cdn.shopify.com/s/files/1/0430/8549/6482/files/silulodaziginew.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7938/files/56306873189.pdf
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/nuvon.pdf
    • https://cdn.shopify.com/s/files/1/0436/1430/6467/files/ropinopiw.pdf
    • https://cdn.shopify.com/s/files/1/0438/3421/2509/files/25155923886.pdf
    • https://cdn.shopify.com/s/files/1/0432/2331/8686/files/10257943118.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_off00007aa6.bin
d26884dfea5139cf68bf882b864045f8759522b78447c13d084074098d3bee76
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 5420 bytes
font_01_sfnt_off00008cf2.bin
ad42c999ca0098cf17d2be31c6e26acc6d1645dc18d0385b2215b9668c7fac85
pdf-font-stream PDF embedded font (sfnt) at offset 0x8CF2 10728 bytes