Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c6aae25351c5478…

MALICIOUS

PDF

32.9 KB Created: 2020-08-18 13:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4cac7ad03314c77d1cb09a673851b5a5 SHA-1: a6595dd246434363f26e1a455fb223a93741495d SHA-256: 1c6aae25351c547878183c5eeac5a77c9425e144b8fcbc62c8979fa34436e531
120 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many of which point to potentially malicious redirectors or link farms. The primary malicious link identified is ttraff.com, which is known for redirecting to malicious content. The document body, though heavily obfuscated, contains text related to comparative adjectives and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of numerous PDF links indicates a strategy to distribute malicious content or engage in SEO manipulation.

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.com/pify?keyword=comparative+degrees+of+adjectives+worksheets
    • http://folan.snscustomfloats.com/uploads/1/3/1/8/131856772/zewumebakopuritalera.pdf
    • http://files.adhdpasadena.com/uploads/1/3/1/6/131607310/tonubugakakakedore.pdf
    • http://files.currenteventcomedy.com/uploads/1/3/1/4/131407135/8216066.pdf
    • http://taluf.tedxdoralacademyprep.com/uploads/1/3/0/9/130969959/2136387.pdf
    • http://files.birdingmoments.com/uploads/1/3/0/9/130969356/3a6c8a520a70.pdf
    • https://cdn.shopify.com/s/files/1/0437/7421/4306/files/java_tutorial_ebook_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/42330602171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/87374790660.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/kajivusu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8240/7335/files/35155055184.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/36476887828.pdf
    • https://cdn.shopify.com/s/files/1/0437/1654/2632/files/63773669452.pdf
    • https://cdn.shopify.com/s/files/1/0433/0913/8075/files/57764798073.pdf
    • https://cdn.shopify.com/s/files/1/0431/9081/2821/files/fixizobi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9808/7328/files/90059460684.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_off0000430c.bin
8fa33cd73234ac83c82aee2ea299082f4f727a34af65249022f9084c2120ca3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x430C 5732 bytes
font_01_sfnt_off00005693.bin
89936d3bbbd035d96354df58c44e86806c8e88197c54701d11912e9a4d13a15c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5693 9328 bytes

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