Malicious PDF — malware analysis report

Static analysis result for SHA-256 806b023b0ff8748a…

MALICIOUS

PDF

44.2 KB Created: 2020-07-28 10:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 314fff293c52899ad6fd2ecac8022dc0 SHA-1: f5334c1886b22b9b4eb191b3b6bfacac289b2bcd SHA-256: 806b023b0ff8748ad12932542722c7a33682be25805ad7ea4f0c40546794ba58
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. It also exhibits a PDF link farm, with many links pointing to Shopify domains, suggesting an attempt at SEO poisoning or hosting a large number of lures. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the embedded URLs and the nature of the link farm strongly suggest a malicious intent to redirect users to harmful content.

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=adagio+secret+garden+violin+pdf
    • http://files.nicolasecastanon.com/uploads/1/3/1/3/131381031/1346642.pdf
    • http://files.treeseedonline.com/uploads/1/3/0/9/130969298/wenibogapeb.pdf
    • http://files.pack131-wrentham.com/uploads/1/3/0/8/130813548/xisavatagesaxotutaxe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6341/9814/files/biwanizogokavevowatip.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/gerosusezixorosana.pdf
    • https://cdn.shopify.com/s/files/1/0436/4628/8025/files/tevejirodonesazekele.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/91025233068.pdf
    • https://cdn.shopify.com/s/files/1/0433/3528/6943/files/durobapidubawu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5153/2963/files/66180557493.pdf
    • https://cdn.shopify.com/s/files/1/0435/6374/5441/files/neridulalanusinemifub.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3098/files/sesovixitotel.pdf
    • https://cdn.shopify.com/s/files/1/0441/0041/9736/files/98017595895.pdf
    • https://cdn.shopify.com/s/files/1/0438/6632/5157/files/44104344342.pdf
    • https://cdn.shopify.com/s/files/1/0438/0891/5613/files/lizesujiwadapam.pdf
    • https://cdn.shopify.com/s/files/1/0438/4954/7936/files/tegobasaliributenonokin.pdf
    • https://cdn.shopify.com/s/files/1/0433/5897/8207/files/filawopuxelebanazata.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/volase.pdf
    • https://cdn.shopify.com/s/files/1/0437/4256/0407/files/wisorafap.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_off000061f1.bin
2f2e92580f6bfbd5e23ecf7a663d6455cbb69add879b46cc8e7203e9d163a199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61F1 5160 bytes
font_01_sfnt_off00007394.bin
26dcb1a178c2f294109239a4975991516e0aa195614234a8603e74fee19d2cd6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7394 15508 bytes

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