Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c4f93c113c5ef6…

MALICIOUS

PDF

58.4 KB Created: 2020-08-11 03:49:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 384c72191f9d5c35b4252c58cfaa73df SHA-1: 49b3b68183f5da79382b5e64bf19235c50f5b2bd SHA-256: 06c4f93c113c5ef68d8e27d5a48eb84e85cd8c95867e09ed3ff3275abab2e16f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, with one identified as a malicious redirector. The ML classifier also flagged the document as malicious. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to malicious sites, potentially for phishing or malware distribution.

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=cable+selection+formulas+for+electrical+load+pdf
    • http://files.projectdancecompany.com/uploads/1/3/0/8/130814229/bd812.pdf
    • http://files.whatissparta.com/uploads/1/3/0/8/130813736/50ede4ad32d2668.pdf
    • http://supofemik.drbrightman.com/uploads/1/3/1/4/131454065/zibamebobarogefa.pdf
    • http://files.quickstitchplus.com/uploads/1/3/1/8/131856279/najusezizoretuvuwo.pdf
    • http://files.studioviemen.com/uploads/1/3/1/4/131453429/1997700.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/dr._cindy_trimm_prayer.pdf
    • https://cdn.shopify.com/s/files/1/0439/3051/7672/files/bufivijoxibafavele.pdf
    • https://cdn.shopify.com/s/files/1/0436/1771/4334/files/domestic_animals_list.pdf
    • https://cdn.shopify.com/s/files/1/0430/8110/5562/files/61566793718.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/2221717303.pdf
    • https://cdn.shopify.com/s/files/1/0430/1481/5901/files/wopitowasoxelo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1720/6949/files/50013875678.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/kozawexibupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3425/5258/files/wifozopiwapomox.pdf
    • https://cdn.shopify.com/s/files/1/0440/7299/2918/files/feloluriwodus.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008230.bin
dbc842c2a2d5b736a8dece38a84a1b1ed767dc43307f71decbd09dcbefe991a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8230 5344 bytes
font_01_sfnt_off00009438.bin
98fb6c13deef282181cf14f25568917e4e297f7bc5a7b162a5b86e2f4cf7fd27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9438 15332 bytes
font_02_sfnt_off0000c48f.bin
c00f55c8a23f8fc12478e3e4ea1bac713d25e4d1dd6e1e4bb5c667610ba6b2cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC48F 16192 bytes

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