Malicious PDF — malware analysis report

Static analysis result for SHA-256 599b879208be2a83…

MALICIOUS

PDF

81.3 KB Created: 2020-09-01 04:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 30f724f757c55ebf36e52bbdb5680c50 SHA-1: adf8cb4785e0ff72bca9df0ab5e878bea48b07f3 SHA-256: 599b879208be2a8367f134791145c49a3ba8539a6bf95305c4161c4848bd454d
152 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1059 Command and Scripting Interpreter T1566 Phishing T1566.001 Spearphishing Attachment T1566.002 Spearphishing Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=hypotension+guidelines+2019'. This URL is presented within the document body, suggesting a phishing attempt to lure users to malicious infrastructure. The ML classifier also strongly indicated maliciousness.

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=hypotension+guidelines+2019
    • https://static.usrfiles.com/ugd/b8c837_8b5d8fcb0dce4fcebba8bc506aba6030.pdf
    • https://static.usrfiles.com/ugd/b8c837_a8e836acaa924b13917c393c764f084a.pdf
    • https://static.usrfiles.com/ugd/9b5f63_8de9367dc1b747f7a85e3416e8621d32.pdf
    • https://static.usrfiles.com/ugd/9e41f0_b509662634594573b1d62165e08d3617.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1346/files/mitubekefapeboboxa.pdf
    • https://static.usrfiles.com/ugd/704566_65f0e0984f5146b5838e8ca1f30a285e.pdf
    • https://static.usrfiles.com/ugd/b0b521_a32b24a7018647e0a27e7ceca163e05d.pdf
    • https://static.usrfiles.com/ugd/cd79e3_99776dba7b294823a729bdaa2482b6ad.pdf
    • https://static.usrfiles.com/ugd/270e53_c2bb65f10f094572a494a49800eb7cd6.pdf
    • https://static.usrfiles.com/ugd/314c35_393e1f38436a4500a4ba6180fe2038be.pdf
    • https://static.usrfiles.com/ugd/2e16aa_17750838952b4515b07264cf7e97f234.pdf
    • https://static.usrfiles.com/ugd/b8c837_d1edcb8a83c94dfea2c829b95e17ac54.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_off0000e212.bin
5fa33b7426c8d0f647d70399709f836d5bc4ac95ff9c769f8c33abd667f176eb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE212 5368 bytes
font_01_sfnt_off0000f477.bin
7a1a41057c2fc0fceb356a2fcd7a7a6bd49c70b298bef4881fff2eae9e9ee272
pdf-font-stream PDF embedded font (sfnt) at offset 0xF477 14964 bytes
font_02_sfnt_off00012331.bin
99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
pdf-font-stream PDF embedded font (sfnt) at offset 0x12331 16060 bytes