Malicious PDF — malware analysis report

Static analysis result for SHA-256 868d7c419174ead6…

MALICIOUS

PDF

44.6 KB Created: 2020-08-03 04:42:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3d2decf3403a3c01f5483d53a4e76a0b SHA-1: ef9b4b858b49bf90b13008a7e49715fe6a898605 SHA-256: 868d7c419174ead6f145632d576a8bce9d523f1c853c3e7622e58020b9a7c211
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One of these links, 'https://ttraff.cc/pify?keyword=trove+chaos+core', is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious content through a link farm, likely as part of a phishing or malware distribution scheme.

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=trove+chaos+core
    • http://files.dj-b-fore.com/uploads/1/3/1/4/131483031/puzajawe-debotalojuro.pdf
    • http://files.djasonbishop.com/uploads/1/3/1/4/131452811/kojubobi.pdf
    • http://files.cabaritamortlake.com/uploads/1/3/1/1/131163514/385f045f9b276.pdf
    • http://files.sueannecelebrant.com/uploads/1/3/1/4/131437351/26ff42c.pdf
    • http://files.breakpointchurch.com/uploads/1/3/1/3/131379578/setiful.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1483/1780/files/45259879630.pdf
    • https://cdn.shopify.com/s/files/1/0432/6945/6028/files/28275486641.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8806/files/61877237876.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/pafuvogavagogikokibuvi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/86070774375.pdf
    • https://cdn.shopify.com/s/files/1/0432/3521/3467/files/jejaxatipanoliv.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/tv_guide_dallas_tx.pdf
    • https://cdn.shopify.com/s/files/1/0430/9565/4554/files/7047055421.pdf
    • https://cdn.shopify.com/s/files/1/0433/0926/9156/files/jurabiwetot.pdf
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/51093239623.pdf
    • https://cdn.shopify.com/s/files/1/0439/1269/1867/files/13836484719.pdf
    • https://cdn.shopify.com/s/files/1/0433/4977/0395/files/9888661967.pdf
    • https://cdn.shopify.com/s/files/1/0434/1052/2277/files/65921832736.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004808.bin
05424168d22f06bc43d64a93240db39cc1e06bbcb9274c8d3e9b2cc851be99f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4808 4864 bytes
font_01_sfnt_off00005887.bin
8e9eaa9f0b82573406f3b6d228f5249d68deebdf90b43e52c2d7bb272ae42f89		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5887 6552 bytes
font_02_sfnt_off00006d5a.bin
3d5366477e30054cf90d345c2f5d01c04d9796e703a8abe93371a991369114f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 9912 bytes
font_03_sfnt_off00008f57.bin
79dc7876d0f1c896d1f2063238996c745234f1ecbc51ce8f4ce3d51ea5e607d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F57 16312 bytes

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