Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c92a6860fcc76ea…

MALICIOUS

PDF

41.3 KB Created: 2020-09-17 00:47:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ade15cdd986f9495c4510bb1c9e92775 SHA-1: 5c1ccefb6a71b1787ad72df77fa8781b3e9e4b3c SHA-256: 6c92a6860fcc76eab1a91448811dde120f01c51b8d40701d8c6f979fdad392bf
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, including a primary link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document appears to be a lure designed to drive traffic to malicious infrastructure through a link farm, likely as part of a phishing or scam campaign.

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.me/wix?keyword=maiko+persona+3
    • http://files.someoneelsemovie.com/uploads/1/3/1/8/131856330/8797656.pdf
    • http://files.jamarkllc.com/uploads/1/3/1/3/131383251/zesimizerimag.pdf
    • http://files.deliveranceforchristians.com/uploads/1/3/1/4/131407164/besukimulovasab-sufiwinarefi-vinegawesu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdf
    • https://cdn.shopify.com/s/files/1/0429/7093/9541/files/48229084494.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/ecological_systems_theory_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0433/9567/8359/files/ruby_json_pretty_print.pdf
    • https://0a576c32-3d29-4400-b0f3-52d93221ed73.filesusr.com/ugd/c83fdb_be4bceee61524924a5672ec66503d6f9.pdf?index=true
    • https://d3c4382d-8a09-4d96-a740-3125775e859f.filesusr.com/ugd/ea2f88_0bd558e88c5f404e954ca87bee4374ac.pdf?index=true
    • https://8c19dabe-adfb-49fa-8959-79e70db2fad0.filesusr.com/ugd/5de1df_82004e3694f341619094216957d54546.pdf?index=true
    • https://cab702d7-aa8c-4730-badb-18f76ebf296e.filesusr.com/ugd/ea2f88_2dd59a6c2d164eaf9c20fe5fa9d3effa.pdf?index=true
    • https://554dc969-b4bb-4999-b6e8-b52c03678555.filesusr.com/ugd/65e777_272febf9db09490fae5d1fc2aeb1fc1d.pdf?index=true
    • https://8665f7b5-fdb3-4017-a90a-e81a12e8d542.filesusr.com/ugd/3be48b_425068c154454c448496ba15cde98e06.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000054c7.bin
07d192b9cf434e09c7d66472f24e334863375f0d36e54783e733666d7438423e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54C7 4444 bytes
font_01_sfnt_off0000649a.bin
2b1f7b4420176a90d99d399f8934864e8e2b9230136df21355f85707e2cc8172		 pdf-font-stream PDF embedded font (sfnt) at offset 0x649A 5016 bytes
font_02_sfnt_off000075cb.bin
a397d404805beaa37fc85bc92f25e26525dcbc95f9a7881f3f36244bd44a54da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75CB 10060 bytes

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