Malicious PDF — malware analysis report

Static analysis result for SHA-256 0888d94c910271f1…

MALICIOUS

PDF

45.0 KB Created: 2020-08-03 04:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8cd228fe94a1a15f487ca96c2d084e6e SHA-1: bb617aa1367080df193f386fdbfeb0cadde311c9 SHA-256: 0888d94c910271f1f8299a5c931d3b7e4f90b7d9560fa286a982fde1954edef5
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 resources, forming a link farm. One of these links, 'https://ttraff.cc/pify?keyword=navpers+1616%252F+26', is identified as a malicious redirector. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or to download further malware.

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=navpers+1616%252F+26
    • http://files.pack23scouts.com/uploads/1/3/0/7/130776131/50fc799da2.pdf
    • http://files.zoningatl.com/uploads/1/3/2/7/132712268/128c84f13b8.pdf
    • http://files.knickknacknook.org/uploads/1/3/2/6/132681660/riveza_xavuwibevovalez.pdf
    • http://sodozox.broadwaymusicstudio.com/uploads/1/3/1/6/131607712/9122d5b8139495e.pdf
    • http://files.museumonmain.org/uploads/1/3/1/3/131380601/gijufekogexak-damegamojojinip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/68704764304.pdf
    • https://cdn.shopify.com/s/files/1/0433/7005/3782/files/lujogepovimejep.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0431/7455/9893/files/kamixel.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/95596815966.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/25087579364.pdf
    • https://cdn.shopify.com/s/files/1/0431/2619/4342/files/81539150030.pdf
    • https://cdn.shopify.com/s/files/1/0428/0814/8127/files/29176072614.pdf
    • https://cdn.shopify.com/s/files/1/0440/6899/5224/files/zorafunifalop.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8595/files/download_microsoft_office_2010.pdf
    • https://cdn.shopify.com/s/files/1/0430/1550/4029/files/9781050597.pdf
    • https://cdn.shopify.com/s/files/1/0448/9058/7291/files/ford_e350_repair_manual_free_download.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_off000073be.bin
bb5d49e95821d6e53ed43c22e3cf4abfb31e37d647458cba14f90b1167fe5b94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73BE 5184 bytes
font_01_sfnt_off0000858b.bin
99ec5f8c63354a0302139051abbfcfe1bafb6ef0e29a570118b01aafc43e51e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x858B 9832 bytes

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