Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9eeb358a4bee200…

MALICIOUS

PDF

41.6 KB Created: 2020-08-15 01:43:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f5d931f18081c4fffbcd959214533922 SHA-1: a8455f94fe50f642fde521f0d8c16b73b21a9e6a SHA-256: c9eeb358a4bee20052b28b42cdbee601c149553c4b8f9ce7cd484e236c9483c1
152 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=hovercraft+design+report', which is flagged as malicious. This suggests the document is designed to trick users into visiting malicious sites under the guise of a design report.

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=hovercraft+design+report
    • http://files.differentstrokes-painting.com/uploads/1/3/2/8/132815008/runejuxeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/1211/8952/files/typedef_in_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/2308/1378/files/pierre_bourdieu_books.pdf
    • https://cdn.shopify.com/s/files/1/0428/0087/3631/files/galilunakej.pdf
    • https://cdn.shopify.com/s/files/1/0430/9952/1181/files/93490491782.pdf
    • https://cdn.shopify.com/s/files/1/0438/5128/4642/files/guluwugudiritajuv.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9504/files/mepazen.pdf
    • https://cdn.shopify.com/s/files/1/0434/3506/5505/files/54106498654.pdf
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/bodogexisedepezunazaxu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6627/7531/files/amoeba_sisters_video_recap_prokaryotic_vs._eukaryotic_cells.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/bogumabatalesote.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_off000064e0.bin
5297cc13abf82da9e0d206318afd84b31eede00b6a46d29ba9da3717efc565f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64E0 5312 bytes
font_01_sfnt_off00007700.bin
8a532779aad663a028ab4252099dfec2b7b39bb0c362873c26b6cd30adb28007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7700 10244 bytes

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