Malicious PDF — malware analysis report

Static analysis result for SHA-256 0624a665466b6677…

MALICIOUS

PDF

40.9 KB Created: 2020-08-05 12:09:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0069e1edfb09b30f5c2fe0d8116ee74e SHA-1: db01669d7a4c8a7d4638615d187bb0988277905b SHA-256: 0624a665466b6677a73491efb06614783dc8340fb4c114dfcab203e531670f79
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that is also flagged as a malicious redirector. This suggests the primary purpose is to lure users to malicious sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=autonomic+neuropathy+diabetes+pdf
    • http://files.quinnfarm.qc.ca/uploads/1/3/1/6/131637853/pures-tikute-gojujuzafi.pdf
    • http://files.russelljordan.com/uploads/1/3/1/3/131379042/2c1b1eb72cda3.pdf
    • http://files.canalscapecounseling.com/uploads/1/3/2/7/132710690/sidatokuwaj-gukutitafela-kozawukav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3526/3138/files/vufidawaxefotafozogotog.pdf
    • https://cdn.shopify.com/s/files/1/0435/4346/2037/files/abbi_jacobson_i_might_regret_this_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/que_es_colostomia.pdf
    • https://cdn.shopify.com/s/files/1/0433/3430/3912/files/36079670329.pdf
    • https://cdn.shopify.com/s/files/1/0438/2146/5757/files/sibux.pdf
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/rinaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/9100/0472/files/gutuluzinizomiso.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/garul.pdf
    • https://cdn.shopify.com/s/files/1/0437/0163/3177/files/17623920663.pdf
    • https://cdn.shopify.com/s/files/1/0436/2688/9374/files/14236383401.pdf
    • https://cdn.shopify.com/s/files/1/0428/3147/8950/files/12214253650.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060bb.bin
9bed24eab42cd3e6e9ad71d33fbc75701bc349607654c76b35588a4e907b30e8
pdf-font-stream PDF embedded font (sfnt) at offset 0x60BB 5592 bytes
font_01_sfnt_off0000739b.bin
43d78a2d8a2b13e5d6a06c054589bf95a76945cc68212d80fc442712b62eed02
pdf-font-stream PDF embedded font (sfnt) at offset 0x739B 10392 bytes