Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ffd38b3156d184b…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 06:10:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1ce9b8b50decc0d0832a7aeda37a3db8 SHA-1: ac6d807b20807e3941e07ac4ec520cd5483b982b SHA-256: 1ffd38b3156d184b09a240198f874f962277ce56120f0ac3b5f3d36d6ea75f93
128 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, pointing to 'https://ttraff.ru/pify?keyword=dcfs+mandated+reporter+manual+illinois'. Additionally, the PDF_SEO_LINK_FARM heuristic indicates a large number of external links, many hosted on Shopify, suggesting an attempt to obscure the malicious destination. The SE_URGENCY_LURE heuristic further supports the social engineering aspect, indicating the document uses language to create a false sense of urgency. No scripts were extracted from this sample.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=dcfs+mandated+reporter+manual+illinois
    • http://files.riverresidentsagainstturbines.com/uploads/1/3/0/7/130776511/juzako.pdf
    • https://cdn.shopify.com/s/files/1/0447/8078/1734/files/academic_recommendation_letter_sample.pdf
    • https://cdn.shopify.com/s/files/1/0430/4742/0066/files/35960431883.pdf
    • https://cdn.shopify.com/s/files/1/0438/5941/1094/files/23012780810.pdf
    • https://cdn.shopify.com/s/files/1/0437/0225/5770/files/gawosamijiwegibugekoko.pdf
    • https://cdn.shopify.com/s/files/1/0448/0453/8528/files/aeropostale_printable_application.pdf
    • https://cdn.shopify.com/s/files/1/0432/0549/2904/files/gituni.pdf
    • https://cdn.shopify.com/s/files/1/0437/2368/6056/files/xeduzekebobutaro.pdf
    • https://cdn.shopify.com/s/files/1/0432/7079/9516/files/titilukiliterapikubexa.pdf
    • https://cdn.shopify.com/s/files/1/0440/7685/9544/files/english_phrases_with_meaning_in_marathi.pdf
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/76475708552.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_off00007d2a.bin
fc856b5716cd88af15de9e96d8f0b71232131b40baff3d05c390602125268af9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D2A 5300 bytes
font_01_sfnt_off00008f10.bin
b6733522f7e38812023878b27213523a24542ced832827cf46e2205cf6c17645		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F10 10748 bytes

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