Malicious PDF — malware analysis report

Static analysis result for SHA-256 957080721742b9f8…

MALICIOUS

PDF

40.4 KB Created: 2020-08-30 02:29:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c7ba52b7a2b63d31f95ca08523f58a9 SHA-1: d1ff985ac44567afde996e3a10b16f8c36e9506e SHA-256: 957080721742b9f86acf732e84efd06454a54eb1d9c3382bac92d02472e14453
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains this URL and numerous other links, many hosted on cdn.shopify.com, suggesting a link farm or content distribution network used for hosting malicious or deceptive content. The primary intent appears to be redirecting the user to a malicious site via the ttraff.com URL.

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.com/wix?keyword=erozyon+ve+heyelan+aras%25C4%25B1ndaki+fark
    • https://static.usrfiles.com/ugd/b8c837_beba4432736d44e8bebca1d18845bce3.pdf
    • https://static.usrfiles.com/ugd/4dd980_1fc9102c67044c2ebb80c203dd022bc0.pdf
    • https://static.usrfiles.com/ugd/a771bd_b96136c2ddf944608c101f5eec0bac85.pdf
    • https://cdn.shopify.com/s/files/1/0429/8863/4266/files/cheat._db_ppsspp_android_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/3918/6344/files/tamanufaliwodixutejetak.pdf
    • https://cdn.shopify.com/s/files/1/0435/8907/5102/files/41183271898.pdf
    • https://cdn.shopify.com/s/files/1/0431/0227/3697/files/jugusoratunupujegokomite.pdf
    • https://cdn.shopify.com/s/files/1/0435/0109/3030/files/rapport_onu_biodiversit_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/digopelokuzabapofosat.pdf
    • https://cdn.shopify.com/s/files/1/0432/7378/1416/files/rujevegobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9143/5422/files/41785478068.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/51289703546.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_off00005d3a.bin
2f3ef44cdf5798447700a647bb52c3a58c2a546511c3a3fcb114de3c01990d4e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D3A 5260 bytes
font_01_sfnt_off00006f24.bin
146da2252588d9967d4707606cba4ed8021acb97083c00484bd442827426e546
pdf-font-stream PDF embedded font (sfnt) at offset 0x6F24 11740 bytes