Malicious PDF — malware analysis report

Static analysis result for SHA-256 379fa533dcfe8c65…

MALICIOUS

PDF

57.2 KB Created: 2020-09-07 06:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 57e2db7710eb48246e921e6ec9425d61 SHA-1: 279dcbf082fb4af3eac97472d2953f9e691f68a8 SHA-256: 379fa533dcfe8c65fb08052b2fd2d5c2a7ad69290e3dba056d7ace14bda17c82
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, pointing to 'ttraff.club'. The document body, though heavily obfuscated, contains text related to 'handwriting worksheets' and the malicious URL itself. This suggests a social engineering lure designed to trick users into clicking the link, which then redirects to malicious infrastructure.

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.club/wix?keyword=make+your+own+handwriting+worksheets+for+kindergarten
    • https://static.usrfiles.com/ugd/7baf93_bbe72b928ba3491f918aba6671db5acc.pdf
    • https://static.usrfiles.com/ugd/63d3ad_963ab21e723a4403b11c23a2802de78e.pdf
    • https://static.usrfiles.com/ugd/b81754_a8a85e75818a4b9ea877b5ee673c0af6.pdf
    • https://cdn.shopify.com/s/files/1/0429/2496/6044/files/wow_3._3._5_leatherworking_guide.pdf
    • https://cdn.shopify.com/s/files/1/0450/6681/3590/files/pediatric_spinal_anesthesia.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/dystrophia_canaliformis_mediana.pdf
    • https://cdn.shopify.com/s/files/1/0465/5493/9542/files/accident_report_san_antonio_police.pdf
    • https://cdn.shopify.com/s/files/1/0434/0744/2072/files/19070039401.pdf
    • https://cdn.shopify.com/s/files/1/0428/2672/7580/files/29039588664.pdf
    • https://cdn.shopify.com/s/files/1/0432/1198/0964/files/91728469401.pdf
    • https://cdn.shopify.com/s/files/1/0447/7770/1533/files/suxisuwalanusaseb.pdf
    • https://cdn.shopify.com/s/files/1/0429/5468/6617/files/60797190620.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/nazisolupoxujotidomugosop.pdf
    • https://cdn.shopify.com/s/files/1/0431/2314/6909/files/15716201625.pdf
    • https://cdn.shopify.com/s/files/1/0431/5847/0822/files/94742936287.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a2c.bin
2744266d95775bd7d189fc0c7af1a66a19a3f2d680f76d0621900a9c229dbe18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2C 17080 bytes
font_01_sfnt_off0000a0a1.bin
babba445d8a68053a1b088012e5df5c5ac6930306ee2ee745078e2c67c45596b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A1 5400 bytes
font_02_sfnt_off0000b324.bin
27f4d8e53ad7d8e55fb377d44c13e51e418fe877d83c5e234117891ac34682ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB324 10392 bytes

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