Malicious PDF — malware analysis report

Static analysis result for SHA-256 0757458d00cae816…

MALICIOUS

PDF

40.6 KB Created: 2020-08-16 12:51:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 58062989e66fea7011228f04d0f60ef5 SHA-1: eb94da90496e9cab23f2d62a468062cc54804003 SHA-256: 0757458d00cae8168dae23a3f12780f237a6f0c78944c40b66f414dffab1208e
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL and text related to a game download, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, further supporting the malicious intent of redirecting users to external, potentially harmful, content.

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.cc/pify?keyword=asura%2527+s+wrath+pc++ocean+of+games
    • http://luwakuz.michellemorganphotography.net/uploads/1/3/2/6/132681393/dc95976178.pdf
    • http://ronovi.thepinkchateau.com/uploads/1/3/1/3/131381679/mopewusexit.pdf
    • http://files.21tarabrooklyn.com/uploads/1/3/2/3/132303269/17fd12f0efe2.pdf
    • http://files.trulloarmonia.com/uploads/1/3/0/9/130969768/paravexebixefuvov.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/vujanafopujog.pdf
    • https://cdn.shopify.com/s/files/1/0430/9755/5108/files/xokaduw.pdf
    • https://cdn.shopify.com/s/files/1/0431/6980/8535/files/tegasozuzoguvemonasesopu.pdf
    • https://cdn.shopify.com/s/files/1/0427/7207/0556/files/buvaxaxok.pdf
    • https://cdn.shopify.com/s/files/1/0433/4262/6984/files/dojuzepesinewe.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/factorio_4_belt_balancer.pdf
    • https://cdn.shopify.com/s/files/1/0438/0357/4434/files/5004069979.pdf
    • https://cdn.shopify.com/s/files/1/0435/0833/4744/files/71318740005.pdf
    • https://cdn.shopify.com/s/files/1/0428/3033/2060/files/batch_convert_word_to_mac.pdf
    • https://cdn.shopify.com/s/files/1/0433/5216/2462/files/tufirisinirov.pdf
    • https://cdn.shopify.com/s/files/1/0440/8446/1720/files/tejikifaxumilujojijidi.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/jazewosevozopugojuri.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9120/files/work_history_report_social_security.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000535b.bin
c31acf05f13b2130a767c4cf21a430d8db9ee640c3bf642f6539da079de2ccfd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x535B 2988 bytes
font_01_sfnt_off00005e05.bin
227884a106a598dbdc836eb8390ee02cc4d26e935b9a63dcbbd92c47a95d7948		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E05 5512 bytes
font_02_sfnt_off000070af.bin
d193976467b91091b95305ec640f13d807945cf7c89e6cf86b71ca1b85303a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70AF 10648 bytes

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