Malicious PDF — malware analysis report

Static analysis result for SHA-256 52961d2a7f360b1b…

MALICIOUS

PDF

49.8 KB Created: 2020-08-24 09:24:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ccfe5572d846003f1332a80999959341 SHA-1: 4bcb0ca4ce2e452faf3baceedfda40ec03309e41 SHA-256: 52961d2a7f360b1b4238585c0d21649f6b218c06ca3d0293a9caa66bfa333354
128 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, specifically pointing to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on Shopify. The document body contains text related to an 'admit card' and a visual call-to-action, suggesting a lure to trick users into clicking the malicious link. The primary malicious IOC is the redirector URL, which likely leads to further stages of an 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.cc/pify?keyword=admit+card+hssc+je+2019
    • http://files.riihannonwilde.com/uploads/1/3/0/7/130776484/lelupavonaja-bulosovanag.pdf
    • http://files.elratontheatre.com/uploads/1/3/1/4/131483148/kiwulufaka-wumex.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/43396058945.pdf
    • https://cdn.shopify.com/s/files/1/0433/9888/9621/files/piwowevebuxiwitazabopa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5040/1943/files/ethnocentrism_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0241/files/bexano.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/riginijulu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1234/9334/files/48266540433.pdf
    • https://cdn.shopify.com/s/files/1/0461/7548/6115/files/counting_missing_numbers_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/risorisutomunewawudo.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/agreement_on_trade_in_civil_aircraft.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006097.bin
9e85ec2a1eae4ad7718f2d946fe76f8f2da82f201b332dc19a3bbcd6ccf6681a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 5268 bytes
font_01_sfnt_off00007278.bin
b9523e470ecd2f2aff12a3d35b7d17904c132733e87b49b6cbe4e7e5beabaa8a
pdf-font-stream PDF embedded font (sfnt) at offset 0x7278 10672 bytes
font_02_sfnt_off0000972d.bin
2c5f1a2e3d9f683f6a217a47aeaaae813f7d4ef732a5ff54a929695507d09140
pdf-font-stream PDF embedded font (sfnt) at offset 0x972D 16092 bytes
font_03_sfnt_off0000abf3.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0xABF3 4324 bytes