Malicious PDF — malware analysis report

Static analysis result for SHA-256 2915c2d85f7e58c2…

MALICIOUS

PDF

41.7 KB Created: 2020-08-29 08:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e18b4ee74b562e3430146d6a801b891d SHA-1: cbbdc203d27679be3cc52f77800d30443802e190 SHA-256: 2915c2d85f7e58c27adb332c22a6025044d9b576f1198983844c3924d90102d0
154 Risk Score

Malware Insights

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

The PDF contains a link farm with 12 external links, including a redirector to a malicious URL. The ML classifier strongly indicated maliciousness. The primary attack pattern involves luring the user to click on the malicious link, likely leading to further compromise. No scripts were extracted from this sample.

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=mountaineering+the+freedom+of+the+hi
    • https://static.usrfiles.com/ugd/b8c837_4b522b4db0354ce3b6b1b87d5fc3bc7c.pdf
    • https://static.usrfiles.com/ugd/b8c837_aa8fbb4b95394160820bdbedba2ec3fe.pdf
    • https://static.usrfiles.com/ugd/b8c837_f09ee20ddcb847f99ea77f51b776e095.pdf
    • https://static.usrfiles.com/ugd/b8c837_54b90d09a6d14d3f87ea9711fef5c835.pdf
    • https://static.usrfiles.com/ugd/b8c837_41e091a9e74441d1ab7d59b58a3b6bc5.pdf
    • https://static.usrfiles.com/ugd/b8c837_0a35383d41c1453a8a46c4ddd7051b09.pdf
    • https://cdn.shopify.com/s/files/1/0434/1828/8284/files/rokadadapolerisemifoma.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/indesign_bookmark.pdf
    • https://static.usrfiles.com/ugd/b8c837_ce1e48244c014206ba6b39bce20c7902.pdf
    • https://static.usrfiles.com/ugd/b8c837_05d9df2d05c9455e9f86b575fbc3670b.pdf
    • https://static.usrfiles.com/ugd/b8c837_e8fe4587652c40f08584ce7fbf0b8d62.pdf
    • https://static.usrfiles.com/ugd/b8c837_48646006ced8452bac9de811d8a80175.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_off00006604.bin
4fdb360aed7970d2e513f627248218e0ed3a49b23329135bfe185406cb4285e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6604 5116 bytes
font_01_sfnt_off00007748.bin
2a882d6ea1f7277e024d2ffd88808d7c450c2586612117f4e7f8f6fb483c967b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7748 10260 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.