Malicious PDF — malware analysis report

Static analysis result for SHA-256 c576ac53bdd0590f…

MALICIOUS

PDF

38.3 KB Created: 2020-08-22 03:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 910e4f3a1515e3876bdec5d35a4fe0c0 SHA-1: bf4ce5c319bf25f1d56c70d445622d852cb07936 SHA-256: c576ac53bdd0590ff87db2e0d4c0d4d8b18d313553eee501a15e5bb02b4d2574
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=bluetooth+software+for+dell+inspiron+1545'. Additionally, it features a PDF link farm with numerous external links, many hosted on Shopify. The document body, though heavily obfuscated, contains the same lure text as the malicious URL, suggesting an attempt to trick users into clicking the link under the guise of downloading software. 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.ru/pify?keyword=bluetooth+software+for+dell+inspiron+1545
    • http://wotejexix.naturalisllc.net/uploads/1/3/0/7/130739017/vopojaropoxav.pdf
    • http://lozibifok.boydfilm.com/uploads/1/3/0/8/130813330/26a783a.pdf
    • http://files.rcdesignceramics.com/uploads/1/3/1/8/131856290/2599222.pdf
    • http://files.bargenorthcompany.com/uploads/1/3/1/1/131163733/39d58b6b186e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9547/4855/files/nekinamenawobanuki.pdf
    • https://cdn.shopify.com/s/files/1/0429/9168/1699/files/tovimivizu.pdf
    • https://cdn.shopify.com/s/files/1/0437/3495/8229/files/1440345173.pdf
    • https://cdn.shopify.com/s/files/1/0432/9635/8565/files/tekonsha_brake_controller_manual.pdf
    • https://cdn.shopify.com/s/files/1/0435/7927/7467/files/tumetufefufobinelawolibup.pdf
    • https://cdn.shopify.com/s/files/1/0435/9575/9779/files/pearson_baccalaureate_essentials_global_politics.pdf
    • https://cdn.shopify.com/s/files/1/0437/8735/4270/files/dubug.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/52543359270.pdf
    • https://cdn.shopify.com/s/files/1/0437/2555/3815/files/49635110353.pdf
    • https://cdn.shopify.com/s/files/1/0430/8992/0154/files/4_hour_work_week_full.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_off00005661.bin
ceac5d97947b7a4061a3c5b0ad7be3f439ba1385345a88f1d1d38eb9fc4d885c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5661 5536 bytes
font_01_sfnt_off00006949.bin
6892c200df56a4f8f74565a0b68c3a93b9fc0b1c14bad9a801029af63edacc7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6949 10244 bytes

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