Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cc7d533bf3b4b8…

MALICIOUS

PDF

40.1 KB Created: 2020-08-24 20:50:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 20a745ceeb9dfd9b7147f998a432d89d SHA-1: 024756bd5a6ba2bd853ac83b6601cd13514942dc SHA-256: 97cc7d533bf3b4b89e1136788a5306ffbc36b303727107e2481abbd688655f65
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple embedded links, with a critical heuristic identifying a redirector link to 'https://ttraff.ru/pify?keyword=format+if+cell+contains+text+excel'. This suggests the document is designed to lure users to malicious infrastructure, likely for further exploitation or credential harvesting. The ML classifier strongly supports the malicious nature of this PDF.

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=format+if+cell+contains+text+excel
    • http://files.mayaannaphotography.com/uploads/1/3/1/4/131407977/xoxawubevazopoto.pdf
    • https://cdn.shopify.com/s/files/1/0439/4621/3544/files/68070280406.pdf
    • https://cdn.shopify.com/s/files/1/0428/3557/4943/files/badewegavixinojopit.pdf
    • https://cdn.shopify.com/s/files/1/0427/6381/3020/files/67042585371.pdf
    • https://cdn.shopify.com/s/files/1/0447/8310/8253/files/memewunobawofataxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7223/3380/files/56713443910.pdf
    • https://cdn.shopify.com/s/files/1/0428/5654/6467/files/nozevijosuruzomazafax.pdf
    • https://cdn.shopify.com/s/files/1/0429/7015/3113/files/jodomomabaju.pdf
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/pdf_to_dwg_converter_abviewer.pdf
    • https://cdn.shopify.com/s/files/1/0429/8955/1770/files/51160180178.pdf
    • https://cdn.shopify.com/s/files/1/0437/0245/2379/files/java_string_reverse.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006013.bin
5e717adff0e9a1d9cd1d50b1d2743f8dfb7a7011aadd9007379ee42c3985e4dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6013 5052 bytes
font_01_sfnt_off00007128.bin
ff47f6c5d735be8709ba018f7ce6a33f8543c492d1a677acd9d13cfcb4bf9424		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7128 10260 bytes

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