Malicious PDF — malware analysis report

Static analysis result for SHA-256 490d8cc4946fd441…

MALICIOUS

PDF

115.5 KB Created: 2020-08-25 01:23:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 22bf890c6ac6806863d90e71debaa849 SHA-1: 3f93a873e9b950885bbc3bbda8f6d5e0561e1bfb SHA-256: 490d8cc4946fd441340727f8dfb29b0bd3039ee34441b11950b66cbc90107c6d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, 'https://ttraff.ru/pify?keyword=et+reporter+news+amharic', is flagged as a malicious redirector. The document body also contains this URL, suggesting the primary intent is to redirect users to malicious infrastructure. 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=et+reporter+news+amharic
    • http://xevub.drewsdecision.org/uploads/1/3/2/6/132682587/c1d44da889.pdf
    • http://files.maeganprovan.com/uploads/1/3/1/0/131070216/3ce89d590a.pdf
    • http://files.kamalfashionuk.co.uk/uploads/1/3/1/3/131379980/3579548.pdf
    • http://delapa.saltandlightbaptist.com/uploads/1/3/1/3/131383483/zakudawo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6333/6350/files/28801937298.pdf
    • https://cdn.shopify.com/s/files/1/0433/8502/8775/files/logiciel_pour_fusionner_gratuit.pdf
    • https://cdn.shopify.com/s/files/1/0428/9455/7350/files/94978394337.pdf
    • https://cdn.shopify.com/s/files/1/0437/7152/7330/files/92401747694.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/jakoninatow.pdf
    • https://cdn.shopify.com/s/files/1/0437/8184/9245/files/apple_watch_android.pdf
    • https://cdn.shopify.com/s/files/1/0438/2025/3344/files/xuxetidogawolo.pdf
    • https://cdn.shopify.com/s/files/1/0429/7896/7703/files/8310278504.pdf
    • https://cdn.shopify.com/s/files/1/0430/3123/2666/files/80940955139.pdf
    • https://cdn.shopify.com/s/files/1/0428/8849/5270/files/xuluxe.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5236/files/chapter_15_infection_control_test_answers.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0ce.bin
e98687761f489dffa515c8b7e9a70035210c31b8545d6831160a755266d5343c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC0CE 83684 bytes
font_01_sfnt_off00018ff4.bin
81dd94ee20b31ebac81fdf15fbd79322d382abd2082a90946db0605e35c42a5c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18FF4 5192 bytes
font_02_sfnt_off0001a17b.bin
fa7d73d10fb4f1e6747bd392235e809fd7e1af679a147572707f2da1c2e8d848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1A17B 8404 bytes

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