Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e1cf3d4b8f6b01…

MALICIOUS

PDF

41.7 KB Created: 2020-08-31 16:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87102544291271169372f03a0b3eab11 SHA-1: 15042b0ee996a60ef36ca16903def0acd24a3df0 SHA-256: b7e1cf3d4b8f6b01b2c974b0fede5b01b363a95ffa37407f09a81c88b11078ea
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.link/pify?keyword=fishing+report+bear+creek+lake+colorado'. The document body, though partially corrupted, contains text related to fishing reports and the malicious URL, suggesting a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to benign content hosting sites but are likely used to obscure the primary malicious destination. No scripts were extracted from this sample.

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/pify?keyword=fishing+report+bear+creek+lake+colorado
    • https://static.usrfiles.com/ugd/5899d5_0433e42b56df4cc893dfc53a56ce58c0.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d3dd884b8d046cea9bfc1153e38cc31.pdf
    • https://static.usrfiles.com/ugd/b8c837_6159d536557e434eb7e86a7a14553414.pdf
    • https://static.usrfiles.com/ugd/1f2646_0fa9e098f2684b77b4eb5373c09d54f8.pdf
    • https://static.usrfiles.com/ugd/f8de3e_5e5c909be7d34602b9a93f8c72d17ddd.pdf
    • https://cdn.shopify.com/s/files/1/0434/4804/1637/files/bevasojinolun.pdf
    • https://cdn.shopify.com/s/files/1/0436/8980/3941/files/3d_max_material_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/73470001672.pdf
    • https://cdn.shopify.com/s/files/1/0469/0775/2608/files/16971400478.pdf
    • https://cdn.shopify.com/s/files/1/0430/6753/9623/files/xegabuvolulasow.pdf
    • https://cdn.shopify.com/s/files/1/0431/6997/2392/files/mokunowedimolu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2966/6724/files/202058423.pdf
    • https://static.usrfiles.com/ugd/221f3a_bc2a3c4fa7fa4181badbe73bc0275d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_da3724f3216541148d9ee4d495fea753.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_off000062d0.bin
0a27f9753134a10cc6edc9ef0c8068f7fd631c4dba7966f3b31c63c3f5138555		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62D0 5492 bytes
font_01_sfnt_off0000756f.bin
6f6a94d377f367aa52b58416c25ae48e047bb2c08885b8f7062ee6a9b0941f3a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x756F 10736 bytes

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