Malicious PDF — malware analysis report

Static analysis result for SHA-256 16cfb2cdc88af64a…

MALICIOUS

PDF

45.4 KB Created: 2020-08-19 19:02:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8daa4f7ed1aebd4fbbce72200d85b46d SHA-1: 18409293a63551d4e03c72ab8eb5a6ff48fdc2f1 SHA-256: 16cfb2cdc88af64aba5cd739ffc1281bc758cf0973634acee3a4884da9611d50
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is likely used to funnel victims to phishing sites or further malicious content. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of numerous external links, suggesting a tactic to distribute malicious content or engage in SEO manipulation for malicious purposes. While no scripts were explicitly extracted, the embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users.

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/pify?keyword=afaceri+de+familie+amanda+quick+pdf
    • http://files.babsbeadwarehouse.com/uploads/1/3/2/6/132681392/ritelelujakudetad.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/2650/5128/files/45213933783.pdf
    • https://cdn.shopify.com/s/files/1/0428/2882/4742/files/mimul.pdf
    • https://cdn.shopify.com/s/files/1/0434/8585/5897/files/dasiwerexugijigijodinavej.pdf
    • https://cdn.shopify.com/s/files/1/0434/6701/4297/files/ibps_bank_exam_materials.pdf
    • https://cdn.shopify.com/s/files/1/0431/2013/2247/files/reduce_size_mac_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0433/7061/0851/files/carmilla_book_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/2553/8980/files/65894587963.pdf
    • https://cdn.shopify.com/s/files/1/0431/2861/9168/files/83919549687.pdf
    • https://cdn.shopify.com/s/files/1/0440/5451/1766/files/turovapisulasek.pdf
    • https://cdn.shopify.com/s/files/1/0432/1280/0159/files/25750785022.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/83759083977.pdf
    • https://cdn.shopify.com/s/files/1/0433/9456/4252/files/tikokufubitere.pdf
    • https://cdn.shopify.com/s/files/1/0446/7264/7331/files/blank_map_of_east_asia.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/70028502595.pdf
    • https://cdn.shopify.com/s/files/1/0429/7208/6423/files/pubuz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e61.bin
68ccd43f1f234a34fc437131d26bf6f6866edcb8fe0de50d95499cba4952d2f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E61 4992 bytes
font_01_sfnt_off00006f27.bin
51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F27 1800 bytes
font_02_sfnt_off000077b5.bin
92437b1206e72c6f6c93139284daffe15b712882186c58551f13154b9690abf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77B5 10060 bytes
font_03_sfnt_off00009a2c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9A2C 4324 bytes

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