Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba995b3efeda5925…

MALICIOUS

PDF

46.4 KB Created: 2020-08-20 23:02:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4928f9539a0b3d8f7723d39dc180745a SHA-1: 58756471ee843d7b14a99f7cc5cbb379d4d2ba13 SHA-256: ba995b3efeda5925611898d55deee6240dfb412e0defc267893316eac75f9b87
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to 'ssc chsl 2019 answer key official' and the malicious URL, suggesting a lure to trick users into clicking the link. The presence of numerous shopify.com links suggests a link farm technique to improve SEO for malicious content.

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.cc/pify?keyword=ssc+chsl+2019+answer+key+official
    • http://files.newsilkstrategies.com/uploads/1/3/1/8/131871480/654177.pdf
    • http://zapizejop.mathiasscarborough.com/uploads/1/3/2/6/132695829/zajefilo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/49686828461.pdf
    • https://cdn.shopify.com/s/files/1/0438/0311/5682/files/latest_consumer_reports_tv_ratings.pdf
    • https://cdn.shopify.com/s/files/1/0436/8728/0790/files/siduwiwadubaresesibejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/1792/0934/files/zuvavemimevevid.pdf
    • https://cdn.shopify.com/s/files/1/0433/3253/4422/files/94949869180.pdf
    • https://cdn.shopify.com/s/files/1/0443/8884/3686/files/97939920457.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xubeke.pdf
    • https://cdn.shopify.com/s/files/1/0430/3791/7345/files/mini_bypass_gastrico.pdf
    • https://cdn.shopify.com/s/files/1/0431/9418/7933/files/xawobu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9649/0663/files/ginugapomokafusuxibimav.pdf
    • https://cdn.shopify.com/s/files/1/0430/8048/2970/files/biegelinie_tabelle.pdf
    • https://cdn.shopify.com/s/files/1/0438/5744/5029/files/89559776913.pdf
    • https://cdn.shopify.com/s/files/1/0428/1437/4047/files/kobib.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_off0000696d.bin
95815a1d53dd83737003ff1b456b2669d55b667187a5771f0b7540d30fb23cf0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x696D 5812 bytes
font_01_sfnt_off00007d3b.bin
ce2f27f353f8afdc4a73e4b538c67a2a0046a91f28d0ba289c7ba1b45bf08f48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3B 15420 bytes

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