Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a2f978ca820bfe…

MALICIOUS

PDF

52.3 KB Created: 2020-08-25 13:04:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1003e1bfa74212c082a5dcde44687856 SHA-1: cd9c692287ae58277dd2b70a4c38167fe5641dc2 SHA-256: 01a2f978ca820bfe9ea135e8cd9103006e961dc8a0eba471808112d3c366cf9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, forming a link farm. One of the primary links, https://ttraff.com/pify?keyword=chiari+1+malformation+mri+criteria, is identified as a malicious redirector, indicating an attempt to lead users to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.com/pify?keyword=chiari+1+malformation+mri+criteria
    • http://ranixegos.thatonecouple.net/uploads/1/3/1/6/131606289/dawixojojilufis_ruduludo_xotuzodutoxasu.pdf
    • http://files.mybaktcbd.com/uploads/1/3/2/3/132302802/waditabe.pdf
    • http://files.naturallyprettynails.com/uploads/1/3/1/0/131070374/nemaguvuvijufik.pdf
    • http://files.condzellasfarm.com/uploads/1/3/0/9/130969555/97c8dd5b0b0479.pdf
    • http://sozosu.sandyhillshunting.com/uploads/1/3/0/7/130740573/44836078f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0459/6485/3408/files/82594983389.pdf
    • https://cdn.shopify.com/s/files/1/0429/0304/4263/files/fagutonaxovirusajusasunu.pdf
    • https://cdn.shopify.com/s/files/1/0430/1130/9719/files/85827019939.pdf
    • https://cdn.shopify.com/s/files/1/0455/7848/5925/files/59121299362.pdf
    • https://cdn.shopify.com/s/files/1/0431/1888/7068/files/casio_fx-_991ms_user_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/3008395401.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/sexojipoj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6154/2045/files/phoenix_wright_ace_attorney_trilogy_walkthrough.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/ahmet_altan_kitaplari.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/46213939499.pdf
    • https://cdn.shopify.com/s/files/1/0428/6844/1254/files/chief_keef_finally_rich.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_off00008e2a.bin
aece7c5ccce8239498b0e9a664a71279c643fe67afbf5d8d19fcca167f372e9e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E2A 4900 bytes
font_01_sfnt_off00009eb8.bin
c427c07609d53e4220d1f3d4a089aa5ab4df18df5854d6c84acd3b7933811276		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB8 11404 bytes

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