Malicious PDF — malware analysis report

Static analysis result for SHA-256 48baa6154e17dbc2…

MALICIOUS

PDF

119.5 KB Created: 2020-08-31 02:27:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec080c41e491798df78cd24483cd4dae SHA-1: 8d84a5c953bcd2f5467a974d690fdc815c92fdc7 SHA-256: 48baa6154e17dbc2e9124e44c5537c5bd5bbd49a69226ddda79c6e8f6fcdd54c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though obfuscated, contains the same URL found in the heuristic, suggesting it's the primary lure. The presence of a large number of external PDF links also points to a link farm strategy, likely intended to obscure the final malicious destination.

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/wix?keyword=the+paths+of+the+righteous+gets+brighter+and+brighter
    • https://cdn.shopify.com/s/files/1/0431/3877/7249/files/573372864.pdf
    • https://cdn.shopify.com/s/files/1/0432/0890/0768/files/82222622740.pdf
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/rogapedatumonisu.pdf
    • https://cdn.shopify.com/s/files/1/0432/6077/2510/files/71617407350.pdf
    • https://static.usrfiles.com/ugd/5b9365_26d8cf4013ab49baabe2c80f686c9e12.pdf
    • https://static.usrfiles.com/ugd/3f80ec_2bf46b7c466a41189aaf5fabe62f7799.pdf
    • https://static.usrfiles.com/ugd/b8c837_eecd241edafc4bee8eb41560b30756cb.pdf
    • https://static.usrfiles.com/ugd/b8c837_2fe6e23ca9a04f1699d0d53e64c6856c.pdf
    • https://cdn.shopify.com/s/files/1/0440/2891/9973/files/bpel_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/android_activity_lifecycle_explained.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6397/files/67196473061.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/surorut.pdf
    • https://cdn.shopify.com/s/files/1/0433/5150/7112/files/ccavenue_payment_gateway_integration_in_php.pdf
    • https://cdn.shopify.com/s/files/1/0439/1705/0008/files/wegowaxemetotonomaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/5751/1590/files/36709032679.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000176b2.bin
70b030f40ed321442ff3bfeeec69309ff2698e9ad2574f45880a7d3ea8474666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x176B2 5244 bytes
font_01_sfnt_off00018877.bin
55939baae3aa275dd7f2a061ca4a89421429de79ac7802597dc1ba884ace24bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18877 19156 bytes
font_02_sfnt_off0001c1c8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1C1C8 4324 bytes

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