Malicious PDF — malware analysis report

Static analysis result for SHA-256 885f0ba527104070…

MALICIOUS

PDF

34.3 KB Created: 2020-08-25 00:40:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a8d1e78a1c85dc6ea94d24aab6355340 SHA-1: fa116742079a7c3760163970bc91be3a2059f7ef SHA-256: 885f0ba527104070867cb56345225c77caaca0a4dd0fc415e809362a2e3bbe94
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lure users to malicious content. The document body, though heavily obfuscated, contains the same URL and a plausible-sounding report title, suggesting a social engineering pretext. The presence of numerous other PDF links, many hosted on Shopify, indicates a link farm designed to obscure the malicious destination. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=vessel+berthing+report+at+nhava+sheva
    • http://files.niocast.com/uploads/1/3/1/3/131379692/09a53d002c6445.pdf
    • http://files.vickylneal.com/uploads/1/3/2/8/132815882/nemat.pdf
    • https://cdn.shopify.com/s/files/1/0431/4238/1725/files/population_ecology_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0450/9289/6920/files/kubukotapibodesilov.pdf
    • https://cdn.shopify.com/s/files/1/0440/7758/0453/files/82163411928.pdf
    • https://cdn.shopify.com/s/files/1/0431/1135/0439/files/fond_de_roulement_et_besoin_en_fond_de_roulement.pdf
    • https://cdn.shopify.com/s/files/1/0439/1501/8392/files/baguzivelamekovar.pdf
    • https://cdn.shopify.com/s/files/1/0433/9574/3907/files/pezuratovedumuganom.pdf
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/ielts_fever_listening_test_17_answers.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71061356311.pdf
    • https://cdn.shopify.com/s/files/1/0434/1399/5672/files/59005958261.pdf
    • https://cdn.shopify.com/s/files/1/0433/6956/2266/files/nebizavikoj.pdf
    • https://cdn.shopify.com/s/files/1/0435/3441/8075/files/9855847257.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/recetas_para_dieta_cetogenica.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_off00004316.bin
ab6577743d403f870177bc67f2a05dadcbe710344edfa4c23def6c63727f6b81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4316 5244 bytes
font_01_sfnt_off000054de.bin
82fb9f30ddef508daed97a9ec2585136e9d2af29ad49c693f0c1ab880689d2a6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54DE 11752 bytes

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