Malicious PDF — malware analysis report

Static analysis result for SHA-256 2867f3edf8b7c07a…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 12:18:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9d8cee42044dd6f819df89d9e330574 SHA-1: 167a5c13f0bfbca11db4e8919b70e90d62f7d534 SHA-256: 2867f3edf8b7c07a3a7fd46e9acbd573f0bd5e9fa5d53a1a555fb37eea302cab
128 Risk Score

Malware Insights

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

The PDF contains a critical heuristic indicating it links to known malicious redirector infrastructure, specifically 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=nsfas+application+form+pdf+download', suggesting a lure for users seeking an 'nsfas application form pdf download'. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to manipulate search results or distribute content broadly. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=nsfas+application+form+pdf+download
    • http://nakerigo.acupunturavetbarcelona.com/uploads/1/3/2/3/132302963/5311415.pdf
    • http://files.newarkvalleychamber.com/uploads/1/3/2/3/132303359/raximuvobum.pdf
    • http://files.airhabbo.com/uploads/1/3/0/7/130739996/zimotuvuvegetovubok.pdf
    • http://files.sacredhuman.co.uk/uploads/1/3/1/3/131379118/muxusigi.pdf
    • http://files.scotskirkparis.com/uploads/1/3/2/8/132815367/579389.pdf
    • https://cdn.shopify.com/s/files/1/0434/6403/2421/files/77649471357.pdf
    • https://cdn.shopify.com/s/files/1/0433/7405/1493/files/61020731009.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0427/9032/2335/files/16793503697.pdf
    • https://cdn.shopify.com/s/files/1/0435/2606/2239/files/85244047850.pdf
    • https://cdn.shopify.com/s/files/1/0431/7514/9719/files/kanozejunutid.pdf
    • https://cdn.shopify.com/s/files/1/0437/4288/8097/files/40636773016.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/47878122177.pdf
    • https://cdn.shopify.com/s/files/1/0431/5696/3479/files/70897824195.pdf
    • https://cdn.shopify.com/s/files/1/0432/7990/9030/files/dr_berg_liver_body_type.pdf
    • https://cdn.shopify.com/s/files/1/0429/1821/5847/files/rocket_propulsion_elements_7th_edition_solution_manual.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_off00006347.bin
ec000daa4f181fafcd8e44fa4e5ea79a961db38a2938c6b93a3b2e190d4cbc22
pdf-font-stream PDF embedded font (sfnt) at offset 0x6347 5364 bytes
font_01_sfnt_off00007580.bin
464d3ab87176a3d44e10b992dbcf368ea28224cbe699cc807ae3d5c615437c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7580 10156 bytes