Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d325be9cce0dbc7…

MALICIOUS

PDF

41.9 KB Created: 2020-09-05 14:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6470b38993ae368d5123834584c6ba7 SHA-1: 60143b7c147f041492f5a2dfb08bdc5fe96f9534 SHA-256: 7d325be9cce0dbc74198176b31d8f05f6ed135fd1abfe375ca906dd9604505e9
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, including a redirector to a site associated with malicious activity. The document body, though partially corrupted, contains the text "Free vector magic" and the malicious URL, suggesting a lure to drive traffic to potentially harmful content. The ML classifier strongly indicated maliciousness, and the presence of numerous PDF links points to a link farm or redirection strategy.

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.link/pify?keyword=free++vector+magic
    • https://cdn.shopify.com/s/files/1/0440/2076/0741/files/gugafiwa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8567/6188/files/diverticulitis_guidelines_2019.pdf
    • https://cdn.shopify.com/s/files/1/0432/5474/3200/files/gonafigogajezuwaxo.pdf
    • https://static.usrfiles.com/ugd/5926b4_c970e29927404963a2eb28f62bf0e33d.pdf
    • https://static.usrfiles.com/ugd/0d2908_0c9c7ab284834e7ebd72a763ecf93b12.pdf
    • https://static.usrfiles.com/ugd/e1d12c_8a8e0e816b3d4e6986ed2a4c0c5998cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_9171afc45e8b4b4cacd8a07933505dd2.pdf
    • https://static.usrfiles.com/ugd/0af078_fcd69258d3a9407bb51598e16d24ccf2.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdf2f87b1ad24e158f538882c5727b89.pdf
    • https://static.usrfiles.com/ugd/b8c837_93ba3da61f764956aa760ba5357b868c.pdf
    • https://static.usrfiles.com/ugd/57c819_4935b14b285242a0a75c392e40c377ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f9e48703d9c436bac8ed881697d6ead.pdf
    • https://static.usrfiles.com/ugd/191a6d_6acdc84e6990498fa4ef10a4fa166ab0.pdf
    • https://static.usrfiles.com/ugd/1df9ea_e2aab566f1a34ba58a7090f732eca3fe.pdf
    • https://static.usrfiles.com/ugd/bfbc46_290e456301e4445ebb3af189417835e3.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_off00005ae0.bin
2461007df8e01bdcc4f36e6f48dc0c17c18289fcc82e63c5cf67b8b1b9ab39e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 4604 bytes
font_01_sfnt_off00006a85.bin
d36efa517c4837acba2f1028416d4b868b4bde24fbe8450f7ebcd1d98f1e096f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A85 9968 bytes
font_02_sfnt_off00008ccb.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCB 4324 bytes

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