Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecc122a465bfaed…

MALICIOUS

PDF

37.9 KB Created: 2020-08-06 18:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f71e7fa83d4272b3cb45524267298861 SHA-1: 89966c2aa04362f9a21ce77a1fbfde3aa26c62be SHA-256: eecc122a465bfaedc9b3e4af282abbcc7b71a22428ec90aa6690a12bea2309a5
152 Risk Score

Malware Insights

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

The PDF document exhibits malicious characteristics, primarily through its extensive use of embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://ttraff.ru/pify?keyword=trauma+life+support+pdf+download'. Additionally, the document functions as a link farm, containing numerous external PDF links, many hosted on Shopify, suggesting an attempt at SEO manipulation or traffic redirection. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=trauma+life+support+pdf+download
    • http://files.artifexhomesolutions.com/uploads/1/3/1/8/131856318/lokov_zudinalotaxitop_bofidaf.pdf
    • http://zopozali.darajafoundation.com/uploads/1/3/1/0/131070786/taseg-jipiti-wadetitalewefek-tirero.pdf
    • http://files.mylittleschooltoronto.com/uploads/1/3/2/6/132681317/xisavizupozoduxira.pdf
    • http://files.cldlab.com/uploads/1/3/1/0/131070336/gejewapogodurezefefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3511/5176/files/kipupet.pdf
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/85284286486.pdf
    • https://cdn.shopify.com/s/files/1/0433/8699/4855/files/conqueror_of_shamballa.pdf
    • https://cdn.shopify.com/s/files/1/0431/8904/3358/files/wunalezidud.pdf
    • https://cdn.shopify.com/s/files/1/0432/7201/1941/files/xisupusebawetatemevi.pdf
    • https://cdn.shopify.com/s/files/1/0429/3407/5558/files/zugir.pdf
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/xixokexulitekakifu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/mivefojuladafubazomom.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2004/files/botany_obe_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/41014814093.pdf
    • https://cdn.shopify.com/s/files/1/0427/9799/0055/files/41137701171.pdf
    • https://cdn.shopify.com/s/files/1/0440/8741/0840/files/woroxiwo.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_off000053eb.bin
736338736676c0048e240ef309daf6f10568fdf960e69e0267db10b488c45bfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53EB 5228 bytes
font_01_sfnt_off000065ac.bin
10286196d8cda9cac0cb927ecdde8af459858ac05dfa4bae855368300c1be73a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65AC 10388 bytes

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