Malicious PDF — malware analysis report

Static analysis result for SHA-256 78bf764770175af3…

MALICIOUS

PDF

48.7 KB Created: 2020-08-28 15:31:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 19c3a4ead4619b0ac3c649795dc4bc17 SHA-1: 6030b3d08fd989a31f7ed6f543e73f7de571b962 SHA-256: 78bf764770175af357d1967ab601aca95e6987e8ef569637da7d5c5ad8e7a13f
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=shadowhunters+ciudad+de+los+angeles+caidos+pdf`. This indicates the document's primary purpose is to lure users to a malicious site, likely for further exploitation or phishing. The ML classifier also strongly flagged this PDF as malicious, supporting the assessment of a malicious redirector.

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=shadowhunters+ciudad+de+los+angeles+caidos+pdf
    • http://files.actionableictd.com/uploads/1/3/0/7/130776439/ec77a10a07c3.pdf
    • http://files.eastbudleigh.org.uk/uploads/1/3/2/6/132696044/patodikirukew-sovapenaxenodab-ziparuweso-dububus.pdf
    • http://sukeno.cheerforcharity.net/uploads/1/3/2/6/132681464/pivugowofipeje-korepekisu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0432/0601/7186/files/derewewufirewamuzijalumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3399/2085/files/gigegamomixepawiji.pdf
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/javascript_lambda_function.pdf
    • https://cdn.shopify.com/s/files/1/0438/2051/5488/files/loxudenulividasunegik.pdf
    • https://cdn.shopify.com/s/files/1/0430/6560/6301/files/aspiration_pneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0428/1961/6935/files/london_stock_exchange_investor_relations_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/7270/1095/files/mandolin_scales_and_arpeggios.pdf
    • https://cdn.shopify.com/s/files/1/0428/6060/9692/files/mibivu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1678/0951/files/jejejizimuzoz.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006538.bin
1048cc4b27c47e4439d33f762678b836620136a038a99f8762490b57564e5a32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6538 5496 bytes
font_01_sfnt_off000077e6.bin
92af5d04c88aa1bea0bcdd5d42eaa188f09789d65e94fb6b8a4e35eb66e56ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77E6 15316 bytes
font_02_sfnt_off0000a5c3.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C3 4324 bytes

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