Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eb383b9592b258…

MALICIOUS

PDF

48.5 KB Created: 2020-07-30 19:14:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9f0b4fca814c8c1f54ee1a6c9bec3b03 SHA-1: 21052d180bd207d8de42c6b89686bb4dbbd6528a SHA-256: 07eb383b9592b258efaa02185e5782f14bf3f60c4034c89421a1c68663bff02d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on Shopify and other domains, forming a link farm. One of the primary links directs to a known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to a 'bearded dragon food list'. The ML classifier strongly indicated maliciousness, supporting the observed link farm and redirector activity.

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=bearded+dragon+food+list+pdf
    • http://files.rubyslipperfund.com/uploads/1/3/0/7/130739922/jetuzedomowurile.pdf
    • http://files.mynailartsupply.com/uploads/1/3/2/6/132682778/2944977.pdf
    • http://files.coolmetoday.com/uploads/1/3/1/3/131398174/5998435.pdf
    • http://files.everlastinglovechurch.org/uploads/1/3/1/6/131607522/e6e1aae7.pdf
    • http://files.skylineprintings.com/uploads/1/3/1/4/131409794/lexej.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6314/8706/files/gotokapawigowinaveme.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/kezisekogekevisupujatupe.pdf
    • https://cdn.shopify.com/s/files/1/0438/3368/8226/files/lolizisifokenirozugadifu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1281/5008/files/88573149055.pdf
    • https://cdn.shopify.com/s/files/1/0440/5942/6968/files/bumuresozijutotumi.pdf
    • https://cdn.shopify.com/s/files/1/0435/3320/5655/files/xovuruvivukamu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0512/4516/files/55406321501.pdf
    • https://cdn.shopify.com/s/files/1/0433/1415/1589/files/waxevevopamufo.pdf
    • https://cdn.shopify.com/s/files/1/0432/0568/9499/files/77597327490.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/wirujokesikeja.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.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_off0000810d.bin
1a8b48d2e7155163846e7786170c94978f19b3d5a9d8e7386c6eb0b1e81d0c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x810D 5048 bytes
font_01_sfnt_off00009245.bin
1e77bac3bc71d1077641c6031693a1c9fddb23a202d0ed3015def46eb9fca7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9245 10156 bytes

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