Malicious PDF — malware analysis report

Static analysis result for SHA-256 152add11b2b2f0c5…

MALICIOUS

PDF

44.1 KB Created: 2020-08-07 14:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c2a1707187b4753a096af8918a47f4 SHA-1: fbc8421ccb08dac42dc234beaf009cc5d827329f SHA-256: 152add11b2b2f0c569a1a3d4fd36fdf13d5d8e07b1984227e7fa2043c1b444f9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One of the embedded URLs, https://ttraff.cc/pify?keyword=les+animaux+fantastiques+livre+pdf, is identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document's primary purpose appears to be directing users to potentially malicious or unwanted content through these 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/pify?keyword=les+animaux+fantastiques+livre+pdf
    • http://files.lasfotografas.com/uploads/1/3/1/8/131856100/jelidixiweb_manuro_pobulejuvul_dolifimuji.pdf
    • http://files.aubrey-annedavis.com/uploads/1/3/1/4/131408502/7ab7c.pdf
    • http://files.kenvoss-solutions.com/uploads/1/3/1/8/131871705/ea5cef03a7aab.pdf
    • http://files.mdt-agilityability.com/uploads/1/3/1/6/131636852/ketimagubi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/6197/8023/files/cedar_ridge_nhs.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/vexolak.pdf
    • https://cdn.shopify.com/s/files/1/0435/9861/0589/files/89811388280.pdf
    • https://cdn.shopify.com/s/files/1/0430/3428/0099/files/fugilib.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/47750729369.pdf
    • https://cdn.shopify.com/s/files/1/0433/6346/7414/files/18661366265.pdf
    • https://cdn.shopify.com/s/files/1/0433/4744/3865/files/bad_blood_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0430/2834/9079/files/extended_forecast_for_vail.pdf
    • https://cdn.shopify.com/s/files/1/0428/2885/7503/files/14153391253.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/rovilikibojotukile.pdf
    • https://cdn.shopify.com/s/files/1/0436/0221/5074/files/12851557085.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/lattices_and_ordered_algebraic_structures.pdf
    • https://cdn.shopify.com/s/files/1/0430/7383/1072/files/59596355437.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_off0000693d.bin
2db6da302edd5753480a0b857e4599c276df9a4ba1c8ff12630b3da00334e56d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x693D 5380 bytes
font_01_sfnt_off00007b83.bin
fd4b895c9c1ec8776b45eef99e206b8c9ed5d85557e5619d01811be2f633c4c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B83 12172 bytes

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