Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0a452b5827f2abe…

MALICIOUS

PDF

47.6 KB Created: 2020-08-09 05:11:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9e9c4b7998ac1d0ca701b65fed77960b SHA-1: 826113ae2334a2501bf7477b53ff3845f6e9bfc0 SHA-256: b0a452b5827f2abe989af9d598c65cbeba0ec467d463b18e8e07c53e0af26165
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The document body, though partially corrupted, contains a URL that points to a known malicious redirector. The presence of numerous embedded links, many hosted on seemingly benign platforms but pointing to potentially malicious destinations, suggests a social engineering attack aimed at luring users to external sites.

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.ru/pify?keyword=mathematical+relation+between+pdf+and+cdf
    • http://files.guskampfans.com/uploads/1/3/0/9/130968988/nijolesejisow.pdf
    • http://files.globalmathcollaborative.org/uploads/1/3/2/6/132681452/2941180.pdf
    • http://files.maptco.com/uploads/1/3/1/3/131384208/tekiv.pdf
    • http://files.ischiareview.com/uploads/1/3/2/7/132740494/diwomebovekaju_gokak_xotiwaponiri_lawozuteliri.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nitopufekuriwuk.pdf
    • https://cdn.shopify.com/s/files/1/0435/6302/4542/files/valud.pdf
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/87780862596.pdf
    • https://cdn.shopify.com/s/files/1/0428/9714/6019/files/wobibowutal.pdf
    • https://cdn.shopify.com/s/files/1/0430/8575/8617/files/free_denis_lapierre.pdf
    • https://cdn.shopify.com/s/files/1/0435/1367/5930/files/john_resig_thechive.pdf
    • https://cdn.shopify.com/s/files/1/0430/7563/3306/files/40293325356.pdf
    • https://cdn.shopify.com/s/files/1/0432/4088/2340/files/mugitewigebazarojabojof.pdf
    • https://cdn.shopify.com/s/files/1/0434/2611/9831/files/85464987272.pdf
    • https://cdn.shopify.com/s/files/1/0435/3179/6632/files/fuzugobawewositazufepena.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/pewefuguxi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2707/1127/files/74223660759.pdf
    • https://cdn.shopify.com/s/files/1/0434/7723/7920/files/face_detection_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0430/3742/5813/files/metutigob.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_off000067a9.bin
04a7def1b17c1a5403078cb318c4b8eb87335c84e3035d9a2c8adb2dbb6b5e37
pdf-font-stream PDF embedded font (sfnt) at offset 0x67A9 5452 bytes
font_01_sfnt_off00007a24.bin
5d75828a1993e08a63f56b65c0ea1b37696f907e36d09e96501af3ec394efcfb
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A24 9900 bytes
font_02_sfnt_off00009c24.bin
c3461001ca888bed6954970c14d027cf202d908e5c0b8e175f896e5a236b6086
pdf-font-stream PDF embedded font (sfnt) at offset 0x9C24 16100 bytes