Malicious PDF — malware analysis report

Static analysis result for SHA-256 63b3f14a36c9aa25…

MALICIOUS

PDF

51.6 KB Created: 2020-08-10 13:31:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b34d48886d6f0a00e958be476a10b4a SHA-1: 06bd6ef1013588a19d1e497430f99d4dd9d0922f SHA-256: 63b3f14a36c9aa25b61028d70b22836f6230303e50acae6e48efa9c89608a758
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a malicious redirector. The document body, though partially corrupted, includes the text 'Energy audit report pdf' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of a link farm and a critical heuristic firing for malicious redirector links strongly indicates a malicious intent to redirect users to harmful content.

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=energy+audit+report+pdf
    • http://begifi.mfinlayson.net/uploads/1/3/1/3/131383664/fezomurifexesaded.pdf
    • http://files.benefitsselection.com/uploads/1/3/1/3/131398367/nabate.pdf
    • http://gawekuvad.neomoonart.com/uploads/1/3/0/7/130776078/pobezavomadisot-zemaf-givaxi.pdf
    • http://dedama.tradingtreasurescrystals.com.au/uploads/1/3/0/8/130874493/jenagipugodomav.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/2174/5825/files/72523299076.pdf
    • https://cdn.shopify.com/s/files/1/0429/1356/2787/files/rotation_90_degrees_counterclockwise.pdf
    • https://cdn.shopify.com/s/files/1/0434/7677/9174/files/jotin.pdf
    • https://cdn.shopify.com/s/files/1/0432/5530/0249/files/allegra_pediatrico_bula.pdf
    • https://cdn.shopify.com/s/files/1/0436/9137/6794/files/minebetibevarofitasawo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/innovage_jumbo_universal_remote.pdf
    • https://cdn.shopify.com/s/files/1/0431/0047/1456/files/84875419459.pdf
    • https://cdn.shopify.com/s/files/1/0428/8777/4374/files/tell_about_yourself_in_english.pdf
    • https://cdn.shopify.com/s/files/1/0434/4964/7261/files/36640087639.pdf
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/nizedekepuw.pdf
    • https://cdn.shopify.com/s/files/1/0429/1729/8329/files/xulupig.pdf
    • https://cdn.shopify.com/s/files/1/0432/0913/0143/files/784203779.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d1a.bin
61f7defa64b0532d98c756d4b90b2085a8f7b66ae4b0d24095f72b25339ac88e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1A 5056 bytes
font_01_sfnt_off00009e69.bin
7a7885a3a9818f25cd131ddc25a7c388e9615dc259f1792c4e059ac4828694a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E69 10384 bytes

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