Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef1da64de2536f70…

MALICIOUS

PDF

47.2 KB Created: 2020-08-31 06:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65c33dfaaeeebdc7620377d0138d1502 SHA-1: 263d99a35432e39988918d508c70f1ab1b046653 SHA-256: ef1da64de2536f70d0272a073dcfbea405e40ff9f11545f8ce20a75072424782
128 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, pointing to a URL associated with cracked software. Another critical heuristic indicates a PDF link farm, suggesting an attempt to game search engines. The document body contains a call-to-action phrase and the malicious URL, reinforcing the lure. The primary malicious IOC is the redirector URL.

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=propellerhead+reason+10.2+crack
    • https://cdn.shopify.com/s/files/1/0433/0287/9387/files/small_review_safe.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0349/files/43468025231.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0352/files/buravasesifosalaleguma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xovigaza.pdf
    • https://cdn.shopify.com/s/files/1/0435/3880/8991/files/29078031218.pdf
    • https://cdn.shopify.com/s/files/1/0432/2135/2606/files/tebozekofusatavaxadomexu.pdf
    • https://cdn.shopify.com/s/files/1/0436/6653/8649/files/apprenticeship_gov_pages_marksheet_validate.pdf
    • https://cdn.shopify.com/s/files/1/0432/7568/1947/files/65465064002.pdf
    • https://static.usrfiles.com/ugd/b8c837_949bcddcbd734bbcaf75a39819f57f67.pdf
    • https://static.usrfiles.com/ugd/6da380_7a024b25b11a4decbd775bbf99abf334.pdf
    • https://static.usrfiles.com/ugd/b8c837_83e7b438a15d4094861e66aa57458834.pdf
    • https://static.usrfiles.com/ugd/902d29_a8202ecb3f78422e99e3ad849b2ea9e8.pdf
    • https://static.usrfiles.com/ugd/b8c837_729d092be7254e4cacead38842b70740.pdf
    • https://static.usrfiles.com/ugd/d7ba0f_08d18f35ac824271b3045c7fe9f4cb2d.pdf
    • https://static.usrfiles.com/ugd/0a593f_9424fc985a3441bea24057d53a60535e.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_off00007494.bin
97624929f98a0eebeeaab52510b63aa95595bbb7a1403fc3f0ed7d59fc4ed595
pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 5584 bytes
font_01_sfnt_off0000878b.bin
264e4860a5424b739b7ae76d3d9b28abccb148e6a66ac2b32da54d520aeed34b
pdf-font-stream PDF embedded font (sfnt) at offset 0x878B 12424 bytes