Malicious PDF — malware analysis report

Static analysis result for SHA-256 8050a69b6afb982d…

MALICIOUS

PDF

37.5 KB Created: 2020-07-30 20:22:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 91e61d28d7d2a76abe687f1b4f2d41c1 SHA-1: 666a4b7f376f74219ce081058a3190287329011a SHA-256: 8050a69b6afb982dec0e79d5bd96bbd1ad9bffde4889067d15d8b5e773c034c0
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, likely for SEO manipulation. One critical heuristic indicates a direct link to a known malicious redirector at 'ttraff.ru'. The document body, though heavily obfuscated, appears to be related to a 'free download' lure, reinforcing the malicious redirection intent.

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=principles+of+helicopter+aerodynamics+pdf+free+download
    • http://files.varanasiastro.com/uploads/1/3/1/8/131856772/kulotonevowapoz_sufodikemoxak.pdf
    • http://files.gentlestrengthbotanicals.com/uploads/1/3/0/7/130739782/5f9452beca38.pdf
    • http://files.jakewarga.com/uploads/1/3/2/7/132740730/4260431.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujar.pdf
    • https://cdn.shopify.com/s/files/1/0434/8290/6789/files/buxefo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/58956880585.pdf
    • https://cdn.shopify.com/s/files/1/0435/8035/8811/files/44559302593.pdf
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/68257398301.pdf
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/52630275017.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9874/files/99642383647.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9011/files/xaxegumovufujavotamufa.pdf
    • https://cdn.shopify.com/s/files/1/0428/0070/9791/files/96190578138.pdf
    • https://cdn.shopify.com/s/files/1/0438/1592/7965/files/kitunobipon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gijamibumiji.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gobobuxewinunegurugita.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/wudiz.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/
    • https://cdn.shopify.com/s/f

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054d2.bin
4a6803c5eaece5a1fc87485e0dc47bbd2488e041ebade2e5c4fa01596c2877d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D2 5380 bytes
font_01_sfnt_off000066f0.bin
1be6e3ca2dcdde10ddcbf9e411ec5e0dafc7b70adf5591536a8916f6e1fc5404		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F0 10036 bytes

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