Malicious PDF — malware analysis report

Static analysis result for SHA-256 b82de06c2581dbf7…

MALICIOUS

PDF

54.5 KB Created: 2020-08-11 22:50:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce6b18a2c4a6240e319670263868b7b8 SHA-1: 80c45baabbddaf7c419626e87b1dabf73116a90a SHA-256: b82de06c2581dbf7712caf66fd47e10bcd5bc183919095ecdc46b289a050b18b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wb?keyword=ortolani%20y%20barlow%20pdf'. Additionally, it features a PDF link farm heuristic, indicating a large number of embedded links, many of which host PDF files. The ML classifier strongly supports the malicious nature of this PDF. The primary attack vector appears to be luring users to a malicious site via embedded links.

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.cc/wb?keyword=ortolani%20y%20barlow%20pdf
    • http://files.mountaingorillacoffeetours.com/uploads/1/3/1/4/131407918/32e2f3a9853e.pdf
    • http://files.bechak.com/uploads/1/3/1/4/131483214/waliwirar.pdf
    • http://kitor.psychodrama-sociometry.com/uploads/1/3/1/6/131606255/kijolav.pdf
    • http://betejeb.mainstchurchofchristonline.com/uploads/1/3/1/0/131071157/nisaman_winuvig_salixunarip_leluvediriliv.pdf
    • https://cdn.shopify.com/s/files/1/0435/4254/4533/files/alcoro_completo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7366/7225/files/la_vie_en_rose_chords_ukulele.pdf
    • https://cdn.shopify.com/s/files/1/0433/4351/1703/files/47005452325.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/91155908754.pdf
    • https://cdn.shopify.com/s/files/1/0434/5564/3809/files/britannica_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/3496/8213/files/zijiloj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/vatedigepireweluzupavuba.pdf
    • https://cdn.shopify.com/s/files/1/0428/4583/1335/files/bomutenabubuperoxoros.pdf
    • https://cdn.shopify.com/s/files/1/0428/1230/9671/files/55129076643.pdf
    • https://cdn.shopify.com/s/files/1/0434/1864/8732/files/76457783647.pdf
    • https://cdn.shopify.com/s/files/1/0434/8493/8390/files/gafoforonitujok.pdf
    • https://cdn.shopify.com/s/files/1/0430/7006/2754/files/12910454936.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072c8.bin
338df4753fb78c395a33177399d347ec44aa9497ce7b5e9c054f466619246211		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72C8 5216 bytes
font_01_sfnt_off0000849a.bin
5db15c9d42ca13a5e416070cc3241ae9eecca5c49aea3ef49ba3d138ba1d616e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x849A 5064 bytes
font_02_sfnt_off00009289.bin
4bbc9098afde2da05ebcdeffa6aaa07754cc4b798ce3f7ae8059203fda8a42e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9289 10356 bytes
font_03_sfnt_off0000b600.bin
4a0beb91f6d09e31e42f80a364e44d88de57beaeb8eb6106c93f1cccda4cd56e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB600 16376 bytes

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