Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfbcc65cc1b2bdc…

MALICIOUS

PDF

43.4 KB Created: 2020-08-30 22:04:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e63afcc3307ac717e89b7bf495c9c381 SHA-1: 4c130a0bb84f42a2b41b17906f8ce7813a125a75 SHA-256: 0cfbcc65cc1b2bdc53d3da1c901fb1a877982deba509580827c0034b6302e203
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links, one of which points to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Adobe illustrator creative cloud revealed' and the malicious URL. The presence of numerous external PDF links suggests a link farm or SEO poisoning tactic to attract victims.

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/wix?keyword=adobe+illustrator+creative+cloud+revealed
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/maxapifevizegawetegupave.pdf
    • https://cdn.shopify.com/s/files/1/0432/8233/3856/files/ladatopaze.pdf
    • https://cdn.shopify.com/s/files/1/0434/3591/7473/files/7308019501.pdf
    • https://cdn.shopify.com/s/files/1/0433/7467/4083/files/kojobipuluruvubeb.pdf
    • https://cdn.shopify.com/s/files/1/0437/5655/2343/files/dutanilijejunarasusuziva.pdf
    • https://cdn.shopify.com/s/files/1/0438/2906/7933/files/cancer_de_pancreas.pdf
    • https://cdn.shopify.com/s/files/1/0430/4899/2930/files/64539195983.pdf
    • https://cdn.shopify.com/s/files/1/0432/1397/9812/files/79094571770.pdf
    • https://cdn.shopify.com/s/files/1/0428/0093/9164/files/granite_mountain_firefighters_autopsy_reports.pdf
    • https://cdn.shopify.com/s/files/1/0432/2931/5239/files/60631023899.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/24387572630.pdf
    • https://cdn.shopify.com/s/files/1/0433/7922/8833/files/41500693117.pdf
    • https://static.usrfiles.com/ugd/1f2646_8abc7a3cc5a642f0ab6fa33ce7433b42.pdf
    • https://static.usrfiles.com/ugd/a771bd_c3512f06e10144ab9f282b16d89b1150.pdf
    • https://static.usrfiles.com/ugd/b8c837_f451828e6a5e4f59b1a49fcadbce9e02.pdf
    • https://static.usrfiles.com/ugd/856cea_930f3864672b46b4a51d025a9c033a6b.pdf
    • https://static.usrfiles.com/ugd/3bca44_3c5dec8334a04ebba02b140cc5c217dc.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_off000067db.bin
d447961b0ef33ec0ac2eb8d09bd74943acf69043b1bd18436416b6c1c2fe313b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DB 5124 bytes
font_01_sfnt_off00007950.bin
66ab0bb645cd2a360d019b53bb709c1610f15651d9e57a52a09d8cdad513c6ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7950 11612 bytes

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