Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde191b2681e0f29…

MALICIOUS

PDF

42.4 KB Created: 2020-08-30 03:44:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cf3e82adfddc505d145325fdfb848e5 SHA-1: d69f7b3c8abd7c669f2c28b069dd4a059f9f8a52 SHA-256: dde191b2681e0f2964ce7642fa6101cb71f39d57bbe995d6ef43e3c67a894c53
120 Risk Score

Malware Insights

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

The PDF file contains a link farm designed to appear as legitimate book downloads, but ultimately redirects to a malicious URL. The primary heuristic indicates a malicious redirector link, and the document body contains the malicious URL and SEO-like links to Shopify domains. No scripts were extracted from this sample, but the embedded links are sufficient to indicate a phishing or redirection attack.

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.me/wix?keyword=download+milk+and+honey+by+rupi+kaur
    • https://cdn.shopify.com/s/files/1/0427/4411/9462/files/nipavimofekedigopir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1974/7996/files/vepazatuwonuzojukemazup.pdf
    • https://cdn.shopify.com/s/files/1/0438/0701/5069/files/fitigoxewudalukasurasi.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/42779790225.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6346/files/wedomelebe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0666/files/atlas_of_human_anatomy_and_surgery_bourgery.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9475/files/tewavigeweradurakexipo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8691/3431/files/systems_analysis_and_design_an_obje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8559/4775/files/davaxuzenetob.pdf
    • https://cdn.shopify.com/s/files/1/0438/7468/0987/files/negative_1_factorial.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/mipovisejebe.pdf
    • https://static.usrfiles.com/ugd/b8c837_548c94c05dee4178b9bbfeab9398e19c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b9a42f47445e48849989b37a702e4ada.pdf
    • https://static.usrfiles.com/ugd/b7ed05_f723e253ab5e4ed0981fccb4cc23661a.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7163694d3c2420f8f09a255e1cdfa80.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/
    • https://static.usrfiles.com/ugd/b8c

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006829.bin
6e654cd4ea592c00d75509ebef9b5883d2b74d972d84499cf258295781151653		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6829 5416 bytes
font_01_sfnt_off00007a7a.bin
b1213a6794bd3991fb7c277d84538d44d2d9d130af6701e84e91a69a65545261		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A7A 9964 bytes

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