Malicious PDF — malware analysis report

Static analysis result for SHA-256 df639b4c6c83030e…

MALICIOUS

PDF

73.0 KB Created: 2020-08-22 10:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b53b33f1a3727398a0039717131f01f SHA-1: 3ce1fde309ae9700e30aafb73cc3f412d0012db1 SHA-256: df639b4c6c83030e12469f78fbbc87e50306fdd27028b8fdcbbf3a311fcf5b30
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=shell+linux+tutorial+pdf'. This URL is embedded within the document body, suggesting a social engineering attempt to trick the user into visiting a malicious site. The file also exhibits characteristics of a link farm, with numerous external links, many hosted on Shopify. The primary malicious URL is the most critical IOC.

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=shell+linux+tutorial+pdf
    • http://files.thaispawellnesscenter.com/uploads/1/3/2/6/132681303/2559174.pdf
    • https://cdn.shopify.com/s/files/1/0433/8286/6083/files/8041132650.pdf
    • https://cdn.shopify.com/s/files/1/0429/5802/8959/files/75404912967.pdf
    • https://cdn.shopify.com/s/files/1/0432/4111/1716/files/davabumixeduxamasi.pdf
    • https://cdn.shopify.com/s/files/1/0429/5717/6986/files/4483983820.pdf
    • https://cdn.shopify.com/s/files/1/0438/6557/1493/files/juvisirukewewusodoradarel.pdf
    • https://cdn.shopify.com/s/files/1/0428/4842/0007/files/9418099187.pdf
    • https://cdn.shopify.com/s/files/1/0432/9095/1846/files/78089021833.pdf
    • https://cdn.shopify.com/s/files/1/0433/9322/0766/files/zedenudinuvemag.pdf
    • https://cdn.shopify.com/s/files/1/0437/8856/6680/files/4133214417.pdf
    • https://cdn.shopify.com/s/files/1/0430/5820/0725/files/68230527578.pdf
    • https://cdn.shopify.com/s/files/1/0432/6604/8164/files/bescherelle_grammaire_francais_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0438/2274/3712/files/github_readme_example.pdf
    • https://cdn.shopify.com/s/files/1/0428/4655/2227/files/lexaruxopim.pdf
    • https://cdn.shopify.com/s/files/1/0429/2060/7900/files/doxidololiguwugodefa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2fe.bin
bc625614fbc4810836405cb6b9f4ccddf122bc89e8f365c3700182726da4dd62		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FE 5004 bytes
font_01_sfnt_off0000e3f4.bin
286c68eb860bcab3dc6c13ea52ba584f6b944868fce993492268dd9e33730f7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 10792 bytes
font_02_sfnt_off000108a6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108A6 4324 bytes

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