Malicious PDF — malware analysis report

Static analysis result for SHA-256 840f67cb3f8f14bc…

MALICIOUS

PDF

47.5 KB Created: 2020-08-01 22:17:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12d934294c83ecb27112a6e63db3748f SHA-1: 88cf48d2d45b0233edf655a89964beb38a2961b0 SHA-256: 840f67cb3f8f14bc3d515f32b1a878421e81c211d04ec47be432044dfe103742
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 specifically pointing to a known malicious redirector. The document body text, though partially obfuscated, mentions 'Onan generator service' and includes a URL that is likely part of a link farm or phishing campaign. The presence of numerous PDF links suggests an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

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.cc/pify?keyword=onan+generator+service
    • http://files.mkbbeauty.com/uploads/1/3/1/3/131380279/lisowiv-kiborokiji-waxivozoxo-refurifew.pdf
    • http://files.jpabh.com/uploads/1/3/0/7/130739369/5f3b50ba75e5cf.pdf
    • http://files.barrackvillechurch.com/uploads/1/3/1/0/131070342/sapuginavuvi.pdf
    • http://files.spcwaterdistrict.com/uploads/1/3/0/9/130969545/6432641.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/0777/7702/files/27655675563.pdf
    • https://cdn.shopify.com/s/files/1/0429/7100/5082/files/18241311399.pdf
    • https://cdn.shopify.com/s/files/1/0445/7309/8143/files/kafka_cheat_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0514/files/facebook_invite_all.pdf
    • https://cdn.shopify.com/s/files/1/0434/3152/6557/files/apostles_creed_catholic.pdf
    • https://cdn.shopify.com/s/files/1/0430/1045/7753/files/88455932171.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/5742140009.pdf
    • https://cdn.shopify.com/s/files/1/0437/2761/8209/files/lideva.pdf
    • https://cdn.shopify.com/s/files/1/0431/3769/5906/files/applied_kinesiology_flowchart_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/7331/4715/files/nodabejaxujujetazazexatil.pdf
    • https://cdn.shopify.com/s/files/1/0430/9526/1348/files/64637840710.pdf
    • https://cdn.shopify.com/s/files/1/0431/5214/6587/files/vikewugamosenu.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_off00007cf7.bin
39b644d4ab333151666e8626d52f744f5e44718e2c58292b903b470560c785f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF7 5024 bytes
font_01_sfnt_off00008e24.bin
650fb7026728b8d34e84667abd85bf6571480f37d42d2bd7c5f2556482eec0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 10332 bytes

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