Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4501b83255d96c…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 10:48:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6e8f9345ae6fa0adba24ba0bd917a29d SHA-1: d928a8d90764f7e21e18cc91dfe57a2512f53f25 SHA-256: 3b4501b83255d96ce18623f9575891cc8ec3c64c0dd74ca8518d7163c0facffb
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as firmware download information, aiming to trick users into clicking it. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external resources. The presence of a call-to-action phrase further supports the lure. No scripts were extracted, and the document body is heavily obfuscated, but the malicious link is clear.

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=cherry+mobile+flare+p1+firmware
    • http://mizotono.rosannecoty.com/uploads/1/3/2/7/132741593/6706041.pdf
    • http://nuvola.johnmraftery.com/uploads/1/3/2/3/132302956/gobufeb_gawurazizasijuf.pdf
    • http://rilag.steadfastleaders.org/uploads/1/3/2/8/132815806/6310961.pdf
    • https://cdn.shopify.com/s/files/1/0431/3602/4737/files/lady_antebellum_bartender.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/nokujotuwijanepoxukazadib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3075/8054/files/marebekufevujasegugoxixan.pdf
    • https://cdn.shopify.com/s/files/1/0463/3044/5981/files/37331635326.pdf
    • https://cdn.shopify.com/s/files/1/0429/2929/1427/files/basic_programming_language.pdf
    • https://cdn.shopify.com/s/files/1/0438/2218/6656/files/soda_to_ppt.pdf
    • https://cdn.shopify.com/s/files/1/0435/8173/5073/files/14400724442.pdf
    • https://cdn.shopify.com/s/files/1/0428/7833/7187/files/voturezezunom.pdf
    • https://cdn.shopify.com/s/files/1/0428/1358/7623/files/godufupazudekusujoraromu.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_off0000617a.bin
cea2a7b1814c28ef764ea5b8b90c21200245db7e2be32b05c5914d87c6b8f6d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x617A 5256 bytes
font_01_sfnt_off0000734d.bin
ebfe0a362099a7d45e02edba72324e1765bd8b8ecb7d63a131dabe1a0b272483		 pdf-font-stream PDF embedded font (sfnt) at offset 0x734D 10288 bytes

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