Malicious PDF — malware analysis report

Static analysis result for SHA-256 4510f2cc8dda36e1…

MALICIOUS

PDF

53.8 KB Created: 2020-08-23 00:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6887dcfe39b6a8436448056848e85c6c SHA-1: 3334a4c72e9b1102215e27cd747538b6d47e74be SHA-256: 4510f2cc8dda36e1fd3eb8abeb9367484b632a2a1ac36d3c473410d76060ff25
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body text, though partially corrupted, includes the search query 'whatsapp for nokia asha 205', suggesting a lure to trick users into clicking the malicious link. The presence of a link farm heuristic further supports the malicious intent of directing users to external, potentially harmful, content.

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=whatsapp++for+nokia+asha+205
    • http://files.independentauthornetwork.com/uploads/1/3/1/4/131482968/kewokuxubed.pdf
    • https://cdn.shopify.com/s/files/1/0439/4447/6840/files/standard_specification_for_chemical_admixtures_for_concrete.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/25884866660.pdf
    • https://cdn.shopify.com/s/files/1/0428/3816/3623/files/xipew.pdf
    • https://cdn.shopify.com/s/files/1/0434/2621/8134/files/pet_practice_test_listening_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0429/5619/3955/files/54848039006.pdf
    • https://cdn.shopify.com/s/files/1/0440/2046/5829/files/51406112087.pdf
    • https://cdn.shopify.com/s/files/1/0437/1975/3879/files/33622566413.pdf
    • https://cdn.shopify.com/s/files/1/0440/2026/9221/files/vagavozulodijopozaxevi.pdf
    • https://cdn.shopify.com/s/files/1/0438/7930/1288/files/kikilezigexebixode.pdf
    • https://cdn.shopify.com/s/files/1/0430/5187/6509/files/aprender_ingles_rapido_gratis.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086ed.bin
415e4db514f3713f1a287d1f91a35bbbf8486496f66570407ca6d81d94f5b1bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86ED 5100 bytes
font_01_sfnt_off0000983e.bin
0d1ccf216ac4ec8f45dc2ef9faae6b08fefb3f4759845d504ba93c48a2251e84		 pdf-font-stream PDF embedded font (sfnt) at offset 0x983E 10612 bytes
font_02_sfnt_off0000bcad.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBCAD 4324 bytes

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