Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cef28ce3b71aa85…

MALICIOUS

PDF

37.7 KB Created: 2020-08-25 11:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9487c8c00f0bfe2c4c3b4912859b45f4 SHA-1: 486a33ee10fad0a5c8f74cc218bfd5c606c2fd1c SHA-256: 3cef28ce3b71aa8516ef226e95306cf9252a2338b437eb20048f60dd9e34ca44
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with a critical heuristic firing for a PDF link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'performance evaluation report form' and includes the malicious URL. The primary attack pattern involves redirecting users to malicious sites via these links.

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.ru/pify?keyword=performance+evaluation+report+form+government+of+punjab
    • http://files.baskog.com/uploads/1/3/1/3/131378953/vewitopemoz-pobopuvegor-fivararojowu-fojudipibewixav.pdf
    • http://vowoxeva.southdevonslinglibrary.com/uploads/1/3/2/7/132740267/feratasupa-savepaxifikano-rusipuzit-kepazeve.pdf
    • http://xedase.fromnicolawithlove.com/uploads/1/3/1/4/131406557/dozibem_zakoxo_ribevomirajifem.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/nezokif.pdf
    • https://cdn.shopify.com/s/files/1/0427/5562/1031/files/toludel.pdf
    • https://cdn.shopify.com/s/files/1/0434/4119/3110/files/66181132094.pdf
    • https://cdn.shopify.com/s/files/1/0429/6287/8618/files/76263050980.pdf
    • https://cdn.shopify.com/s/files/1/0437/1336/4121/files/abstract_sample_for_research_paper.pdf
    • https://cdn.shopify.com/s/files/1/0434/7625/4873/files/lolikesixofesax.pdf
    • https://cdn.shopify.com/s/files/1/0434/2156/5084/files/wivavukakovuvosubalu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9165/6864/files/mekanisme_kerja_benzoil_peroksida.pdf
    • https://cdn.shopify.com/s/files/1/0432/5045/0600/files/makalah_dinasti_bani_abbasiyah.pdf
    • https://cdn.shopify.com/s/files/1/0440/1197/8902/files/3860137196.pdf
    • https://cdn.shopify.com/s/files/1/0432/5425/1670/files/babur_gaan_dj_song.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_off0000540c.bin
12b9a8a563a8c217845d70a1424491bde695c2274591ff959aff1b56323528d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 5432 bytes
font_01_sfnt_off00006677.bin
65a4bb0ed5715739efd8dd578b4d266ec2c2e21aef1109196c395ed15f2ff738		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6677 10392 bytes

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