Malicious PDF — malware analysis report

Static analysis result for SHA-256 4249693b7aca98c4…

MALICIOUS

PDF

74.5 KB Created: 2020-08-15 00:48:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d3bd2d538a608e49e925ae1ed537163 SHA-1: 470a56badac97514b268c9b2052664fb5066d18b SHA-256: 4249693b7aca98c49df521df067bcde7522c5f0d6521c49a38bfd9ef1cd0714f
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=bounty+hunter+korean+movie'. This URL is presented within the document body, disguised as a movie title, to entice users to click. The file also exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The primary malicious link is the most significant 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.cc/pify?keyword=bounty+hunter+korean+movie
    • http://files.recommendrainbow.com/uploads/1/3/1/1/131164202/b9e8e6eb79c499c.pdf
    • https://cdn.shopify.com/s/files/1/0438/3493/3398/files/kalevagesofi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5978/9472/files/95881464253.pdf
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/80250711109.pdf
    • https://cdn.shopify.com/s/files/1/0434/9542/4165/files/anginas_de_pecho.pdf
    • https://cdn.shopify.com/s/files/1/0428/2023/9519/files/gutogex.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8541/files/94352678090.pdf
    • https://cdn.shopify.com/s/files/1/0437/1264/3223/files/acute_pyelonephritis_in_adults_nejm.pdf
    • https://cdn.shopify.com/s/files/1/0437/0071/5674/files/casio_edifice_5041_manual.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/87484463382.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/72805176389.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000766d.bin
199eb3f12cd8a3b78b3f052fb5cabb0fcc6ad067d8f2cf1c5240c8e1447bc488		 pdf-font-stream PDF embedded font (sfnt) at offset 0x766D 29376 bytes
font_01_sfnt_off0000d259.bin
ae0381e9489c1f3f8a0c9044b824adb53bc513baaf7c9405e581bfe74f12d888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD259 4988 bytes
font_02_sfnt_off0000e333.bin
72e0a47c9c51027502b462d413994c8a9bcb1d94167e69f7a03388d7951c0bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 10512 bytes
font_03_sfnt_off0001075d.bin
532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 16204 bytes

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