Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5cc7757ce58cdc…

MALICIOUS

PDF

43.8 KB Created: 2020-08-09 13:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4a74444aa8780df93f5365884d1bedea SHA-1: e421278b5d89736c1728d0c4c5978471514a680a SHA-256: 7b5cc7757ce58cdcdc12fa0bf3ff92637c6cbdd9990c6859a467f97c96e64ec1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell

The PDF contains a mass external link farm, with the primary link redirecting to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirect. The presence of a password-protected archive lure suggests a multi-stage attack where the actual payload is hidden.

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=brute+force+attack+definition+pdf
    • http://files.makealltimetreasures.org/uploads/1/3/1/3/131384300/jovazuzupi-vejexatove-doduvozavopajon.pdf
    • http://vobegefo.shansurfny.com/uploads/1/3/0/8/130814238/9ece5b96ca314ee.pdf
    • http://files.polowl.com/uploads/1/3/1/4/131413905/wozovopa_jinut_vizim.pdf
    • https://cdn.shopify.com/s/files/1/0431/5663/5816/files/disejipapatodovir.pdf
    • https://cdn.shopify.com/s/files/1/0428/1607/7991/files/47991512623.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.pdf
    • https://cdn.shopify.com/s/files/1/0438/2470/9782/files/iit_kharagpur_b_tech_cse_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/luridaxifakaselefopo.pdf
    • https://cdn.shopify.com/s/files/1/0432/7673/0533/files/valores_normales_de_leucocitos_en_orina.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/short_tricks_for_aptitude_questions.pdf
    • https://cdn.shopify.com/s/files/1/0440/5533/0981/files/biology_notes_class_10_cbse_life_processes.pdf
    • https://cdn.shopify.com/s/files/1/0435/0276/4184/files/65140827082.pdf
    • https://cdn.shopify.com/s/files/1/0430/8375/9765/files/driver_tool_kit_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0434/7111/0308/files/xubavinotipotigepafeto.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_off00006d53.bin
d19c91b1f5371805617f0848bebcb3a0af895c217ab0dd5db849dc9c149de831		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D53 5052 bytes
font_01_sfnt_off00007e9e.bin
7b0124f70a4b2b084344f2b3163714c1a85ab27964f678cf400d07d28616335a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E9E 10420 bytes

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