Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c4f8b2c6963f2cb…

MALICIOUS

PDF

53.0 KB Created: 2020-08-11 18:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0450940f9ffef306fbee180f0c9dea96 SHA-1: 0fa0eb2d0fd46d9b4cf11dd8cd8974e0b6af9770 SHA-256: 3c4f8b2c6963f2cb4ecc1bcfc004f4e49404d52af48a9bb9f798418f8f96c994
150 Risk Score

Malware Insights

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

This PDF document contains a mass of external links, masquerading as a definition of 'active and passive components'. The primary link directs to a known malicious redirector, ttraff.com, which likely serves as a gateway to further malicious content. The ML classifier strongly indicated maliciousness, and the presence of numerous SEO-optimized PDF links suggests a link-farming or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=active+and+passive+components+definition+pdf
    • http://files.linqforum.com/uploads/1/3/1/1/131164425/9378006.pdf
    • http://files.reaganmdavisphotography.com/uploads/1/3/0/9/130968921/wapogi_subujeb.pdf
    • http://jusejab.davidsolomonjudaica.com/uploads/1/3/1/4/131453215/notubedodopilo.pdf
    • http://files.inspiringindonesia.com/uploads/1/3/2/6/132695734/9622420.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5099/files/39798039191.pdf
    • https://cdn.shopify.com/s/files/1/0434/4758/2870/files/columns_and_beams_in_building_construction.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/lejozusuxawunulimedobina.pdf
    • https://cdn.shopify.com/s/files/1/0428/7689/5398/files/grievance_procedure_in_the_workplace.pdf
    • https://cdn.shopify.com/s/files/1/0434/4673/0904/files/penesafetuzeman.pdf
    • https://cdn.shopify.com/s/files/1/0429/8371/9071/files/12616119827.pdf
    • https://cdn.shopify.com/s/files/1/0432/4956/5853/files/6271829119.pdf
    • https://cdn.shopify.com/s/files/1/0428/6231/3631/files/giralimigorijo.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7983/5547/files/98488665607.pdf
    • https://cdn.shopify.com/s/files/1/0431/7554/2950/files/25853190690.pdf
    • https://cdn.shopify.com/s/files/1/0432/0264/2075/files/zuwogomonujomijinojo.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_off000092f3.bin
1457928bd43253dc64259aac4bc42a193311826810ff1a7d58815ef1c3f7583c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F3 5224 bytes
font_01_sfnt_off0000a4ad.bin
150a972c90b3837d800c9f79bef70ea330175d9602ab3f6720ca78efaaa8a8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4AD 10084 bytes

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