Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6e5474789f276a8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 07:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dfea5f6629e950483f5dc84e1f21dbc SHA-1: cdd9cd0188bd889cbc231ec8755295f882810a63 SHA-256: c6e5474789f276a8dad3b3b382df1b3a4728dd4fa4d8d81ff468a8339df10e06
120 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. The primary redirector URL, https://ttraff.com/pify?keyword=computer+programming+books+pdf+download, is flagged as malicious. This suggests the document is designed to redirect users to potentially harmful content under the guise of providing free book downloads. No scripts were extracted from this sample.

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=computer+programming+books+pdf+download
    • http://files.yogascapesinjapan.com/uploads/1/3/1/1/131164275/8473436.pdf
    • http://files.rachaellongsculpture.com/uploads/1/3/0/7/130775413/bae428037.pdf
    • http://files.beingaum.com/uploads/1/3/1/4/131453432/645ed0deda24770.pdf
    • http://files.gimliwaterfrontcentre.com/uploads/1/3/1/4/131454238/rexij.pdf
    • http://files.ladymillam.com/uploads/1/3/0/9/130969993/jutiwuzezibosuro.pdf
    • https://cdn.shopify.com/s/files/1/0437/6671/0429/files/safenopefazufowemifokape.pdf
    • https://cdn.shopify.com/s/files/1/0434/5269/4680/files/363109799.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/95692036548.pdf
    • https://cdn.shopify.com/s/files/1/0441/4645/8776/files/bernhard_riemann_biografia.pdf
    • https://cdn.shopify.com/s/files/1/0436/9845/4682/files/mokavujevuviwezotagose.pdf
    • https://cdn.shopify.com/s/files/1/0433/2588/2518/files/form_8825_instructions.pdf
    • https://cdn.shopify.com/s/files/1/0427/4572/5094/files/43846160900.pdf
    • https://cdn.shopify.com/s/files/1/0440/6575/1192/files/tajowerekesonuzabawexoriz.pdf
    • https://cdn.shopify.com/s/files/1/0434/7602/5510/files/5979851004.pdf
    • https://cdn.shopify.com/s/files/1/0434/0160/9366/files/19669357575.pdf
    • https://cdn.shopify.com/s/files/1/0429/5829/1093/files/45371267488.pdf
    • https://cdn.shopify.com/s/files/1/0438/0193/6033/files/amarakosha_odia.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_off00005eb9.bin
0ab2c3bc6afe923311946e251494a2d243160c3c4c3b09bd896e2cd03dd15e9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EB9 5560 bytes
font_01_sfnt_off00007198.bin
c082457738748696cdf8b18108de37f756db522f7e47a7c8d98a0c0700d97a53		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7198 9852 bytes

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