Malicious PDF — malware analysis report

Static analysis result for SHA-256 516a7df55d5ddf69…

MALICIOUS

PDF

44.9 KB Created: 2020-09-09 01:39:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 02897a199afdf5dcde2d1235df603301 SHA-1: 486e827acb5a30f1860a513d1f2d48e182596587 SHA-256: 516a7df55d5ddf690d5f3bc366b1e05d90457fcfc65ab66d51a5ae1613056870
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.link/wix?keyword=action+essentials+pack+2+free'. Additionally, it exhibits a PDF link farm heuristic, with numerous links to Shopify-hosted PDFs, suggesting a broad distribution attempt. The ML classifier also strongly flagged this PDF as malicious. The document body contains the same malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/wix?keyword=action+essentials+pack+2+free
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/jakipilegutojijakowegiveb.pdf
    • https://cdn.shopify.com/s/files/1/0435/5014/6723/files/26818502438.pdf
    • https://cdn.shopify.com/s/files/1/0433/5858/4986/files/timber_mod_minecraft.pdf
    • https://static.usrfiles.com/ugd/eda9ba_63496fb8b6e640a2a697929dfd89d1cf.pdf
    • https://static.usrfiles.com/ugd/1849a1_386b75ba9abf4766a54add4f3cc3e9f0.pdf
    • https://static.usrfiles.com/ugd/d94ae5_bad580e8cebc460ab5a2908f8d6c2c28.pdf
    • https://static.usrfiles.com/ugd/b8c837_7fff9f9f92fe470e8787a2c9e5916a9e.pdf
    • https://static.usrfiles.com/ugd/c12414_1fd9b0a5d84f4bc29491b50524624c42.pdf
    • https://static.usrfiles.com/ugd/ab63e3_dca6716ae23b40198795ddc07b4325fd.pdf
    • https://static.usrfiles.com/ugd/b8c837_45eea6fc25a44ca69e9ed652ba3cb6c1.pdf
    • https://static.usrfiles.com/ugd/b8c837_c575e52dff6f467181dd5c68f6159dc2.pdf
    • https://static.usrfiles.com/ugd/516793_7c4dedfd9b404e3ea3e1d09c9d672236.pdf
    • https://cdn.shopify.com/s/files/1/0432/8154/7424/files/85093169551.pdf
    • https://cdn.shopify.com/s/files/1/0434/4253/6598/files/6639910689.pdf
    • https://cdn.shopify.com/s/files/1/0428/1263/7351/files/pruebas_liberadas_ser_bachiller_2020.pdf
    • https://cdn.shopify.com/s/files/1/0429/6887/5157/files/91796960748.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_off00005fd8.bin
9d32cf8d24fe56bd865b356d96ce9899357dd993c836c1eb575cda0c5c06f135
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD8 4980 bytes
font_01_sfnt_off000070ca.bin
0584d40aba7a6f77c860ff8290228a58199b7d6d87726735ad842078b6eef0dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 11696 bytes
font_02_sfnt_off000096ec.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x96EC 4324 bytes