Malicious PDF — malware analysis report

Static analysis result for SHA-256 45f38f3f84b0cfc0…

MALICIOUS

PDF

47.1 KB Created: 2020-08-11 19:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ecdd82b5d797ea7d68a3053742364cc4 SHA-1: c294165989f6f80d9acd202cdcf38fdd05fd4c41 SHA-256: 45f38f3f84b0cfc0e3543e695b01266946fd4425cc95348a6964186e08a6872f
130 Risk Score

Malware Insights

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

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body text and heuristics indicate a lure to download a converter, which likely leads to a malicious payload. The presence of a link farm and a call-to-action button further supports a phishing or social engineering attack pattern.

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/wb?keyword=excel%20sheet%20to%20pdf%20converter
    • http://files.perennialposy.com/uploads/1/3/2/6/132695445/8348434.pdf
    • http://files.wadelightheart.net/uploads/1/3/1/4/131407278/sanidiwuwo_renig_vigiwapuvot_jabipezilape.pdf
    • http://laturewak.tangwenfang.org/uploads/1/3/1/0/131071252/vutufop-nabuvam-vagusozigaz-sijolo.pdf
    • http://files.christopherdavidroche.com/uploads/1/3/2/6/132695492/6139e70eed083.pdf
    • https://cdn.shopify.com/s/files/1/0437/3823/5031/files/nutulafegiw.pdf
    • https://cdn.shopify.com/s/files/1/0439/4103/6200/files/39643934747.pdf
    • https://cdn.shopify.com/s/files/1/0429/2427/7923/files/55381614624.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zurutadodusabexefiba.pdf
    • https://cdn.shopify.com/s/files/1/0429/1674/1286/files/74701911390.pdf
    • https://cdn.shopify.com/s/files/1/0437/1657/5383/files/electronic_troubleshooting_and_repair_handbook.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3658/files/12515113282.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6435/files/skmei_watch_manual.pdf
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/42590588198.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdf
    • https://cdn.shopify.com/s/files/1/0432/2649/7182/files/2306743885.pdf
    • https://cdn.shopify.com/s/files/1/0427/5326/1724/files/beowulf_a_verse_translation_norton_critical_editions.pdf
    • https://cdn.shopify.com/s/files/1/0450/9207/7731/files/convert_to_word_document_free.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_off00006543.bin
1c0d5cec2d5cba527056023a7223cf609acdc5b9789df232bb95c8c5b08f9b04
pdf-font-stream PDF embedded font (sfnt) at offset 0x6543 5120 bytes
font_01_sfnt_off000076ad.bin
186bf9250066bb932280b2d7df920ee3c78fa09fc5a36f05d2d24842cef94d1f
pdf-font-stream PDF embedded font (sfnt) at offset 0x76AD 10424 bytes
font_02_sfnt_off00009aa1.bin
82808991bf2634d521b2ccc057447e3924061576bc9adec3b256e3a0bf672a23
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AA1 16076 bytes