Malicious PDF — malware analysis report

Static analysis result for SHA-256 27871002d14727c2…

MALICIOUS

PDF

39.4 KB Created: 2020-08-06 18:31:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8625f5f99effea0efc818ae0f8a0e989 SHA-1: 0385000f79c509c90caabc3cfb0d4831d3cc9df7 SHA-256: 27871002d14727c2840b84eafd4c0f67b22b92e26dafc0fa0f6eb22411e5be0b
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, many of which point to external sites, indicating a link farm. One critical heuristic identified a PDF redirector link to 'ttraff.ru', which is known malicious infrastructure. The document body, though heavily obfuscated, contains text related to 'pdf splitter merger download' and the malicious URL, suggesting a social engineering lure to trick users into downloading further malware. No scripts were extracted from this sample.

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=pdf+splitter+merger+download
    • http://files.chuckallenloans.net/uploads/1/3/0/7/130739533/sinafurupaxufatifez.pdf
    • http://files.furiouscrafting.com/uploads/1/3/0/7/130776054/4311340002d4f.pdf
    • http://files.hfnyourvoice.uk/uploads/1/3/1/4/131482864/4828027.pdf
    • http://files.justkiddingtheatrecompanyinc.org/uploads/1/3/2/6/132681325/dotilezefezij-kudinijorap.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8839/files/xemafonumo.pdf
    • https://cdn.shopify.com/s/files/1/0428/8184/3356/files/96160070524.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/nagamagezalaxi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9411/3446/files/76180191336.pdf
    • https://cdn.shopify.com/s/files/1/0430/0134/8255/files/jidusa.pdf
    • https://cdn.shopify.com/s/files/1/0428/3482/1287/files/45307218993.pdf
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/60981113128.pdf
    • https://cdn.shopify.com/s/files/1/0428/5281/0911/files/bizodifaloxakakiwexadodin.pdf
    • https://cdn.shopify.com/s/files/1/0432/4127/5547/files/critical_accounting_theory.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/adenoma_de_hipofisis_sintomas.pdf
    • https://cdn.shopify.com/s/files/1/0434/3729/3724/files/fenewafurol.pdf
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/ropelobaforozifivopalo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2692/2146/files/16803220748.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_off00005b8a.bin
69d84291025d2d60bb35810eb053acd20f3ffdbaf432ee116c198e9565bdcb1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8A 5456 bytes
font_01_sfnt_off00006e13.bin
5526931c5c1b6399c34cba563152fc4ed72df6d4f5eeb859c5e1a077d21db95b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 10136 bytes