Malicious PDF — malware analysis report

Static analysis result for SHA-256 4961c46fd9584b1c…

MALICIOUS

PDF

43.5 KB Created: 2020-09-15 18:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7a974cac758f0c7450c6e625fed75e6 SHA-1: 2f6359fb50d87cc6106913ba36488279c424da0a SHA-256: 4961c46fd9584b1c49e5df255e687cde03f3c27fb19828f6e247406974ee1203
128 Risk Score

Malware Insights

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

The PDF contains a prominent link that, when clicked, redirects to a malicious URL. This is further supported by heuristics indicating a malicious redirector link and a PDF link farm, suggesting a campaign to distribute malware or phishing content. The document body text and embedded URLs reinforce the lure of downloading software, which is a common social engineering tactic.

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.link/pify?keyword=google+cast+for+education+download
    • http://files.sharing-international.org/uploads/1/3/0/9/130969532/lugurowimoxupo.pdf
    • http://files.wraptileny.com/uploads/1/3/2/3/132303337/e0da9005.pdf
    • http://files.reysroast.com/uploads/1/3/1/8/131872017/7284437.pdf
    • http://texibeti.nickfon.com/uploads/1/3/1/4/131408168/4445441.pdf
    • http://files.enfieldctbouncehouserentals.com/uploads/1/3/1/4/131437246/sixare-badubi-jijeme.pdf
    • https://static.usrfiles.com/ugd/b8c837_022b0d37a9d44b1cbbf68fabf55a8b34.pdf
    • https://static.usrfiles.com/ugd/7c3584_c798ab88b6ae4f74837e1f6f847bf20a.pdf
    • https://static.usrfiles.com/ugd/7a11b0_a7833ffd989b46adb0aea6e6a4d227c9.pdf
    • https://static.usrfiles.com/ugd/3c2e2e_efc847902a8b4575bb66a5a8b1cd6b32.pdf
    • https://static.usrfiles.com/ugd/110ef3_20ba468dccf84ebfad9576db229df9a2.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5578033559.pdf
    • https://cdn.shopify.com/s/files/1/0435/5942/0063/files/gurokiba.pdf
    • https://cdn.shopify.com/s/files/1/0432/6490/1270/files/45360178612.pdf
    • https://cdn.shopify.com/s/files/1/0450/1677/6862/files/neet_2020_answer_key_aakash.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_off00006bc3.bin
35cb9b3c243344e378ca32dfa76be50e824bf9ce977b8a1c52cdfce5f32532dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BC3 5312 bytes
font_01_sfnt_off00007dfa.bin
0195997aa1ab9f7240583046f68b12dfe531d61a28556ddf89b13c0f07be9c46		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DFA 10348 bytes

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