Malicious PDF — malware analysis report

Static analysis result for SHA-256 f49415c6324b0fb3…

MALICIOUS

PDF

68.9 KB Created: 2020-09-13 11:04:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3592c6d0daf293a1e3cca066b60423e9 SHA-1: 05113d94566587f2e1f4f18d2afbf324ee13232f SHA-256: f49415c6324b0fb3ff6fd3815c4bb9d3c12b28d47800bb9d9a74d406ed70bade
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector infrastructure at 'https://ttraff.me/pify?keyword=cu+zn+phase+diagram+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to redirect users to harmful content.

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/pify?keyword=cu+zn+phase+diagram+pdf
    • http://files.artsequality.org/uploads/1/3/1/3/131398367/4f74ba96.pdf
    • http://jupatebuw.8000robohawks.com/uploads/1/3/1/1/131164312/xoxalev.pdf
    • http://files.designsbygiacomo.com/uploads/1/3/1/8/131871745/nijokupe-tovozurubo.pdf
    • http://files.i-ecc.net/uploads/1/3/1/3/131382134/b23713f3c615cd.pdf
    • https://static.usrfiles.com/ugd/0bfb20_58ce8ae369d84652a65f5884421c6aaa.pdf
    • https://static.usrfiles.com/ugd/70c1f8_7ec506fa93c645e48340258933116492.pdf
    • https://static.usrfiles.com/ugd/338562_7567720a420042ea8abbf86ec1425e39.pdf
    • https://static.usrfiles.com/ugd/6f5f23_5a0b6b8fa52b4a2cb57a6bdac9efdbff.pdf
    • https://static.usrfiles.com/ugd/7e0eb0_6640ece62bf949bf8415f551004dbe61.pdf
    • https://cdn.shopify.com/s/files/1/0433/4731/2789/files/adobe_reader_for_windows_10_64_bit_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0431/6846/5053/files/wafesiv.pdf
    • https://cdn.shopify.com/s/files/1/0432/5995/3312/files/rofetefomoma.pdf
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/44663972674.pdf
    • https://static.usrfiles.com/ugd/2ca22b_a41e2752b2874fc8bda2f51c0ae59f9c.pdf
    • https://static.usrfiles.com/ugd/6116da_c7c7c095ff864e178b74b577e4c23901.pdf
    • https://static.usrfiles.com/ugd/3eb4bd_81a9605759d242d3a00d29ebc7c98a57.pdf
    • https://static.usrfiles.com/ugd/cf5aa9_20c530925b48461a9fda0c4778a611ec.pdf
    • https://static.usrfiles.com/ugd/b926a8_6110cb16820040ed9c37ae35acd6ddc7.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be71.bin
d8704fe735ad5231804b9516ef34b9d74f5e2c3b3c9f78c653d5d4a6efc709ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBE71 5376 bytes
font_01_sfnt_off0000d096.bin
2e15af202d085764832cb2df10fd5db14de23d0dcb71ac90c1299c391f02483f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD096 17376 bytes

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