Malicious PDF — malware analysis report

Static analysis result for SHA-256 55548a28b4940618…

MALICIOUS

PDF

39.0 KB Created: 2020-08-31 15:11:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cc87cfb95c8f2cefc92438f47e947e1 SHA-1: 6da51266d40132e25c8cff18d08e6cf377df6b0e SHA-256: 55548a28b4940618f3930212be0264268d21bf6748b8f7b1048c87e6412b9907
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=biodata+for+job+template+word'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which point to static.usrfiles.com. The document body, though heavily obfuscated, contains the same job template lure and the malicious URL, reinforcing the attack pattern.

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/wix?keyword=biodata+for+job+template+word
    • https://static.usrfiles.com/ugd/b8c837_4a50be436c8a44bdb1535a13f6970ac7.pdf
    • https://static.usrfiles.com/ugd/b8c837_6d8407c9959e4ee9ae53b1189bb69f36.pdf
    • https://static.usrfiles.com/ugd/0511f5_2ef799908d7e40aeaa94e1a420b8dd22.pdf
    • https://static.usrfiles.com/ugd/b8c837_6274f12b50da40bb8e6f7fc642afa0eb.pdf
    • https://cdn.shopify.com/s/files/1/0430/5689/0013/files/subog.pdf
    • https://cdn.shopify.com/s/files/1/0432/6014/9910/files/kuworasafulagim.pdf
    • https://cdn.shopify.com/s/files/1/0433/1231/6584/files/website_icon_pack_free.pdf
    • https://static.usrfiles.com/ugd/850f07_e3774e66f7bd4ee39ec0dcee993a915b.pdf
    • https://static.usrfiles.com/ugd/cac9e4_39332ae8c03b4baf83a4885a80309a80.pdf
    • https://static.usrfiles.com/ugd/1e32c2_07b627bbb77b4aa7b689f83ef6076f3b.pdf
    • https://static.usrfiles.com/ugd/26938b_fdf1deee2cb04ac18bf9f8b0f314cce0.pdf
    • https://static.usrfiles.com/ugd/599026_6c41e14e6dc5426ba888ea23cc384b9e.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_off00005bd1.bin
a1665ac7c934816d920bc310c52052327b946749db1e3b76bd37681669ec78db		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BD1 5368 bytes
font_01_sfnt_off00006e0c.bin
8b45eb79d9f24ee622c532d0d05d06badf54ae79dcd310be4375733b980b8212		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E0C 9856 bytes

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