Malicious PDF — malware analysis report

Static analysis result for SHA-256 25d51f126de4467d…

MALICIOUS

PDF

55.4 KB Created: 2020-08-01 09:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62825be98cd8e9fe5e566b197615f41d SHA-1: 68682f580d234f9e0bd5e395d78f1316fd228bbe SHA-256: 25d51f126de4467d094b6cd5b1a1df45b44043d2937fa170204157049b0f655c
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link farm designed to manipulate search engine results, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, suggesting the intent is to trick the user into clicking the link. The PDF also contains numerous other links to Shopify-hosted PDFs, likely part of a link farm to improve SEO for the malicious redirector.

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.com/pify?keyword=sai+baba+madhyan+aarti+in+telugu+pdf
    • http://files.rem5vr.com/uploads/1/3/1/3/131384098/f45b5f67aedebba.pdf
    • http://files.kevinhopkinsagency.com/uploads/1/3/2/8/132815054/54bf8a0d0e.pdf
    • http://files.faithsnotsoaveragelife.com/uploads/1/3/1/4/131407958/ledozaguwejafag.pdf
    • http://files.clubvaultitudetexas.com/uploads/1/3/1/3/131398252/wewofirinipabup.pdf
    • http://files.townsonsmithdesign.com/uploads/1/3/1/3/131380138/2981646.pdf
    • https://cdn.shopify.com/s/files/1/0438/4443/6128/files/wisirazibabipimewonere.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/86477918810.pdf
    • https://cdn.shopify.com/s/files/1/0434/0567/2597/files/lapalopogevaxen.pdf
    • https://cdn.shopify.com/s/files/1/0432/7292/9435/files/35797259703.pdf
    • https://cdn.shopify.com/s/files/1/0440/9065/4870/files/dolajoxaz.pdf
    • https://cdn.shopify.com/s/files/1/0432/0509/9675/files/55190106777.pdf
    • https://cdn.shopify.com/s/files/1/0434/9673/4880/files/bupedakuxujovu.pdf
    • https://cdn.shopify.com/s/files/1/0437/5589/6983/files/budabefadogefafumuni.pdf
    • https://cdn.shopify.com/s/files/1/0435/4542/8127/files/62497202079.pdf
    • https://cdn.shopify.com/s/files/1/0429/6451/7023/files/81310740745.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/74710931619.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/libidurekatomanazavevufi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9806/2501/files/kerekirejaxovino.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/16704567471.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000725b.bin
5f92da9aa99c0a3ef8df7cc3f22f366090703ce54befb83cbe557c1a28825caf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x725B 5392 bytes
font_01_sfnt_off00008480.bin
540c5eb6e59f1f31d5aea9897bccf43d55994331b00578e2f3fdb488724f2b88		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8480 15512 bytes
font_02_sfnt_off0000b492.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB492 4324 bytes
font_03_sfnt_off0000c293.bin
c75b893f2b6a65f19c4897f9da34380f1679f418ea8b1719fed9092d6494dfad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC293 3324 bytes

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