Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c651f9bfd9d3e6…

MALICIOUS

PDF

40.0 KB Created: 2020-08-19 00:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b0202484b80b9d83056aa6862dca9ac5 SHA-1: 01db4f56267771e26f29ab0437e6ca7698e87af0 SHA-256: 26c651f9bfd9d3e6844d0c76868acece58e49f8b29f2755aa89bbdf4899ce672
128 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.com/pify?keyword=cambridge+dictionary+app+full+apk'. This URL is presented within the document body, disguised as a download for a dictionary app, and is intended to lure the user to malicious infrastructure. The PDF also contains a link farm heuristic, indicating a large number of external links, many hosted on Shopify, which is a common tactic for SEO poisoning or distributing malicious content. No scripts were extracted from this sample.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=cambridge+dictionary+app+full+apk
    • http://mejol.eighty7eighty8.com/uploads/1/3/1/3/131397970/dokezepo_warowugugi_jukuzenigulo_lokud.pdf
    • https://cdn.shopify.com/s/files/1/0435/4641/1160/files/brexit_deal_summary.pdf
    • https://cdn.shopify.com/s/files/1/0431/5620/9819/files/93446308621.pdf
    • https://cdn.shopify.com/s/files/1/0428/2197/6220/files/diwugidewurux.pdf
    • https://cdn.shopify.com/s/files/1/0431/9654/7230/files/veobecn_a_anorganick_chmia.pdf
    • https://cdn.shopify.com/s/files/1/0437/2588/1498/files/when_to_use_binomial_cdf_vs.pdf
    • https://cdn.shopify.com/s/files/1/0431/6761/3087/files/university_of_miami_spring_break_2017.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8044/files/82362202981.pdf
    • https://cdn.shopify.com/s/files/1/0429/5504/7068/files/usb_killer_diy.pdf
    • https://cdn.shopify.com/s/files/1/0434/8438/1337/files/xutevimopobipupurelimofid.pdf
    • https://cdn.shopify.com/s/files/1/0427/7318/4678/files/34953315397.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_off00005cf2.bin
24a3ccc4ca7d067729d77e52088b22c2d97b3d9cf3f1ff883fb1ccb36477c679		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF2 5508 bytes
font_01_sfnt_off00006fa3.bin
525208e770f39d0161506eef237cc0133f4375a972edc9c0f56d3e499d2a1559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FA3 10420 bytes

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