Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb9ed6e254df24a…

MALICIOUS

PDF

45.3 KB Created: 2020-08-05 05:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b2fdcf22b9cff6632b40fe11750bfda SHA-1: 64f52e36ca674fe5e882319253be93875b06ec18 SHA-256: 7cb9ed6e254df24a51987f8f5557fca4f60cd0d1d42f17080f261ba2ba41095c
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.com'. The document body and embedded links also indicate a lure for a book download, which is a common social engineering tactic. The presence of numerous external PDF links, many hosted on Shopify, suggests a link farm designed to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL.

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/pify?keyword=antenna+theory+analysis+and+design+4th+edition+pdf+free+download
    • http://files.x4edu.com/uploads/1/3/1/6/131637714/8d7722ef8e56b8b.pdf
    • http://files.cabinmill.com/uploads/1/3/1/4/131482975/lijim_jubizufo_latogelosoza_lawas.pdf
    • http://files.kevinggd.com/uploads/1/3/2/8/132815388/joxopexejosorurenow.pdf
    • http://files.parachuteteachers.com/uploads/1/3/1/3/131398504/5458814.pdf
    • https://cdn.shopify.com/s/files/1/0428/8974/0441/files/jovak.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1973/files/31366294583.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/fizafusamevukiverijixujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/5244/9435/files/15203779001.pdf
    • https://cdn.shopify.com/s/files/1/0433/8260/3927/files/58765076841.pdf
    • https://cdn.shopify.com/s/files/1/0437/0923/5353/files/jejebenimon.pdf
    • https://cdn.shopify.com/s/files/1/0435/1344/6564/files/66437481339.pdf
    • https://cdn.shopify.com/s/files/1/0435/8298/0259/files/tuxoku.pdf
    • https://cdn.shopify.com/s/files/1/0433/4629/6982/files/revowabuxomu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3518/1724/files/46249819174.pdf
    • https://cdn.shopify.com/s/files/1/0433/2175/3758/files/felobujulufesigifokas.pdf
    • https://cdn.shopify.com/s/files/1/0430/3293/6605/files/47756553728.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/xobafir.pdf
    • https://cdn.shopify.com/s/files/1/0433/4823/0297/files/dd_362.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_off0000590e.bin
f7501c3e02e993df1b5c0d783baab50c4fd8c81283b778b802d9f091e2893f11
pdf-font-stream PDF embedded font (sfnt) at offset 0x590E 5576 bytes
font_01_sfnt_off00006c22.bin
33d80b5e357abfa3ea91f5eff18928953f8e36d8e9a7aea158c838e8ae756dd9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 2116 bytes
font_02_sfnt_off000075ec.bin
21eb61241f602bafff497be39afbc4b7df4bb758948f40d021dc58cb01a08b50
pdf-font-stream PDF embedded font (sfnt) at offset 0x75EC 15400 bytes