Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a00b487c199ed2e…

MALICIOUS

PDF

38.6 KB Created: 2020-08-29 01:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e86e48a29f091e139c0d52d340faff10 SHA-1: db02eb78321b21077343fd1b7062d63f951e9e28 SHA-256: 1a00b487c199ed2e52bd1b155d05c4ed356aec0eaaf51357209aacee327a1177
130 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it redirects to malicious infrastructure. It also contains a PDF_SEO_LINK_FARM heuristic, suggesting it's part of a link farm. The document body, though heavily obfuscated, contains text related to 'printable self help workbooks' and a URL that aligns with the malicious redirector. The presence of numerous links, including one to a known malicious redirector, strongly suggests a phishing or redirection attack.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.ru/wix?keyword=printable+self+help+workbooks
    • https://static.usrfiles.com/ugd/b8c837_2c86a6a768184e918a51f511b9c0e906.pdf
    • https://static.usrfiles.com/ugd/b8c837_6690fb169f5d4519ae7e6e9a55f3cb58.pdf
    • https://static.usrfiles.com/ugd/b8c837_a3a449a4cffc487d994f167b764bb8c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_e71686ae0bf54d148562e98766d6f469.pdf
    • https://static.usrfiles.com/ugd/b8c837_65242c9da00b488a82eb34ecaf09c1ec.pdf
    • https://cdn.shopify.com/s/files/1/0446/0537/4628/files/1645450375.pdf
    • https://cdn.shopify.com/s/files/1/0430/8061/4041/files/josifodim.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/lp_bblr.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9430/files/colors_tv_show_mp4.pdf
    • https://cdn.shopify.com/s/files/1/0454/2988/3048/files/teorias_da_aprendizagem_motora.pdf
    • https://cdn.shopify.com/s/files/1/0430/8028/6372/files/jajuvaxofusadinukovifi.pdf
    • https://cdn.shopify.com/s/files/1/0437/5091/6247/files/tisizapizediruxajoliwul.pdf
    • https://cdn.shopify.com/s/files/1/0430/7081/6407/files/wizabow.pdf
    • https://static.usrfiles.com/ugd/b8c837_1fd2cfb063c54edfbef3f335d69857df.pdf
    • https://static.usrfiles.com/ugd/b8c837_5941800d48d84f419c6aca8870b62f18.pdf
    • https://static.usrfiles.com/ugd/b8c837_07678323f78b4d569390d06684eff081.pdf
    • https://static.usrfiles.com/ugd/b8c837_42a66ad919d34360ae6ce3c67c1ee1a9.pdf
    • https://static.usrfiles.com/ugd/b8c837_4a87aba0e8764feda54d5ba9866ba59c.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_off00005852.bin
c495beb5fc5c883228d010b60b15dcf81a6640f40a1b55a2cb64112dd0822ca9
pdf-font-stream PDF embedded font (sfnt) at offset 0x5852 5288 bytes
font_01_sfnt_off00006a4e.bin
c1c46a2b2a772d0923294bae03929269ad3ceb6723bcb71c2c9ce885ea99c659
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A4E 10308 bytes