Malicious PDF — malware analysis report

Static analysis result for SHA-256 f83aafd158d70723…

MALICIOUS

PDF

41.5 KB Created: 2020-08-26 21:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5311babf82f7387c1b8021f204b7962c SHA-1: adc204aa89a18272736623841ca5cd1dd93d6373 SHA-256: f83aafd158d7072342ce3ed76352d4ff4f89428e83c8152af43b8d9215c18976
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, specifically pointing to 'ttraff.me'. The document body, though heavily obfuscated, contains this URL and references to a 'Samsung n8000 pit file', suggesting a lure. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to Shopify, likely to improve search engine ranking for malicious content. The primary malicious IOC is the redirector URL.

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.me/pify?keyword=samsung+n8000+pit+file
    • http://nasoz.misshartwellsclasspage.com/uploads/1/3/0/7/130775666/f6c4f67faa.pdf
    • http://nuvirale.eileenenwrighthodgetts.com/uploads/1/3/1/4/131438500/154732a1886.pdf
    • https://cdn.shopify.com/s/files/1/0433/7047/9766/files/jevulime.pdf
    • https://cdn.shopify.com/s/files/1/0434/7399/3890/files/83045816823.pdf
    • https://cdn.shopify.com/s/files/1/0462/6346/8189/files/80904346674.pdf
    • https://cdn.shopify.com/s/files/1/0433/9263/0947/files/aqa_a_level_biology_specification.pdf
    • https://cdn.shopify.com/s/files/1/0434/5508/6742/files/ramefuzamonala.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/kamus_bahasa_jawa_krama.pdf
    • https://cdn.shopify.com/s/files/1/0434/9621/0594/files/43478401910.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/88065476392.pdf
    • https://cdn.shopify.com/s/files/1/0428/2544/9628/files/wigozabijasiditu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/sizigimexazoku.pdf
    • https://cdn.shopify.com/s/files/1/0430/8582/4164/files/41010905300.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/saxon_math_course_2_answers.pdf
    • https://cdn.shopify.com/s/files/1/0436/0683/5358/files/motipugigagikapebatudu.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_off00006160.bin
13da551262d78ae516d2907bafb112d1b572084c9abf7ce39328d1d3d87e5c04		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6160 5564 bytes
font_01_sfnt_off00007437.bin
2cad7b3226d0b7e4151b850ef20a29320db199f4db613c8b7985d2bf3453c156		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7437 10900 bytes

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