Malicious PDF — malware analysis report

Static analysis result for SHA-256 3957526d39c3d59f…

MALICIOUS

PDF

49.1 KB Created: 2020-08-08 06:00:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88b720018ee52a716ee4af98d8f78234 SHA-1: e3afdde56aae2bb09a0ed1b5bd0e6e5e3a9bb38d SHA-256: 3957526d39c3d59fa3098418045047eafdfad6678207f2ea071c28106f45a8ab
120 Risk Score

Malware Insights

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

The PDF document contains a link farm with 17 external PDF links, including a primary malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=certificat+de+cession+de+voiture+pdf', which is identified as a malicious redirector. This suggests the document's purpose is to trick the user into clicking the link, leading them to a malicious site.

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=certificat+de+cession+de+voiture+pdf
    • http://files.brineandbroth.com/uploads/1/3/1/4/131407061/651213.pdf
    • http://files.thefaithlife.org/uploads/1/3/0/7/130740524/d3c96d2c.pdf
    • http://files.edgertoncentermakerspace.com/uploads/1/3/2/6/132681479/5332072.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7478/files/sewalux.pdf
    • https://cdn.shopify.com/s/files/1/0437/5052/3031/files/pedafumipebaf.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vujunuvitiwowus.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/gw2_charged_quartz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3181/2504/files/38254620717.pdf
    • https://cdn.shopify.com/s/files/1/0433/4836/1375/files/korigaxebe.pdf
    • https://cdn.shopify.com/s/files/1/0448/4897/1938/files/car_amplifier_repair_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/3822/9158/files/maxiperiwuposu.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6563/files/14446259807.pdf
    • https://cdn.shopify.com/s/files/1/0428/5412/1635/files/21018230694.pdf
    • https://cdn.shopify.com/s/files/1/0428/2833/3219/files/agresti_franklin_statistics.pdf
    • https://cdn.shopify.com/s/files/1/0437/9597/2256/files/hockey_central_at_noon.pdf
    • https://cdn.shopify.com/s/files/1/0430/2818/5239/files/76849360625.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/puxatofutedixa.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_off00007f57.bin
adaddcb65b09d2320dbe4129ea7920d7d245025d4f9194bdac360c4267673f49		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F57 5080 bytes
font_01_sfnt_off000090b5.bin
f05ca5e81774090e0a2445e8b60de60a67d8cace2b440b51ccee35767fef03f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x90B5 11948 bytes

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