Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b5cdfc1b823d894…

MALICIOUS

PDF

47.5 KB Created: 2020-09-29 19:34:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4dc872b9c2fa225e657f8f954c85f9b9 SHA-1: bd204fa1452d6188541f8ca686dac50434b3339c SHA-256: 9b5cdfc1b823d894850cdcc819a5ca665a60f659fe91163f4fa04ee2af5826fb
120 Risk Score

Malware Insights

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

The PDF file contains numerous links designed to mimic a link farm, with a primary malicious redirector URL. The document body, though heavily obfuscated, contains text related to 'Adobe pdf reader free download' and the malicious URL, indicating a social engineering lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, suggesting the intent is to drive traffic to potentially malicious sites or downloads.

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://gettraff.ru/strik?keyword=adobe+pdf+reader+free+download+full+version+for+windows+7
    • http://wuzor.lilianholm.com/uploads/1/3/1/3/131381045/8421934.pdf
    • http://files.green-runners.com/uploads/1/3/1/0/131070362/tanimiso.pdf
    • http://files.grandmau.com/uploads/1/3/2/6/132696104/zudepobifinodu-wosotofa-domunumetanob-diwuba.pdf
    • http://dadopuz.uminnpaleo.com/uploads/1/3/1/0/131069839/d50802410.pdf
    • http://sadumob.maxthemobileman.co.nz/uploads/1/3/1/3/131379858/gidedubedilip_fopawu.pdf
    • https://uploads.strikinglycdn.com/files/954a3949-afe7-4f2d-8693-3d3e9bfccfe2/7217753135.pdf
    • https://uploads.strikinglycdn.com/files/0aab3e44-3086-451e-9dab-a4db68ce9e98/mupubupojov.pdf
    • https://uploads.strikinglycdn.com/files/b20fccb7-7111-417f-956f-f3b9340761a5/50016280220.pdf
    • https://uploads.strikinglycdn.com/files/37cbf557-ed10-4a3f-89fb-b41f1091ec12/tuvumipureva.pdf
    • https://uploads.strikinglycdn.com/files/dd3c2ecb-202d-4957-adb1-14fa3f1f3064/vudubapapugikatawopog.pdf
    • https://cdn.shopify.com/s/files/1/0431/0476/4068/files/lifuwuledetowo.pdf
    • https://cdn.shopify.com/s/files/1/0434/2788/9302/files/xotijifenebofipuvawesum.pdf
    • https://cdn.shopify.com/s/files/1/0437/3449/9493/files/97254463872.pdf
    • https://cdn.shopify.com/s/files/1/0433/6222/2232/files/35460464243.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0053/files/treatment_foster_care_virginia.pdf
    • https://cdn.shopify.com/s/files/1/0432/9131/2288/files/genesis_allan_kardec.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_off00007bdf.bin
76a0bb69eaa19e545652e5b7c3ff30b3b2467cf9c53cbaa6c504674f2add0e6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDF 5396 bytes
font_01_sfnt_off00008e5c.bin
26c5cd140b661b364badeb5f347eb5439a91a92910ec47ea8b597725e9427fa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E5C 9936 bytes