Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9d90abea8de17d…

MALICIOUS

PDF

109.4 KB Created: 2020-08-21 10:00:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d41aa2ba116e28ef52ec5d52dfe52f SHA-1: 5f180d1d47de327f5fb3f24853a47ed884d11a6d SHA-256: 3c9d90abea8de17d943237173b4c712d6d197c1f0d626b6486aa5edd3740e600
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is likely used to redirect users to a malicious website. Additionally, the PDF exhibits characteristics of a link farm, with numerous embedded URLs, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.com/pify?keyword=shin+chan+pictures
    • http://dovawij.elysianonearth.com/uploads/1/3/1/3/131383664/vulata.pdf
    • http://files.benbloor.com/uploads/1/3/1/4/131483955/visujulorefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9376/9894/files/behavioral_neuroscience_books.pdf
    • https://cdn.shopify.com/s/files/1/0436/4474/7929/files/xabobizojazaf.pdf
    • https://cdn.shopify.com/s/files/1/0432/7977/7952/files/xisijezir.pdf
    • https://cdn.shopify.com/s/files/1/0431/3242/0262/files/sejogosewebobu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8933/0325/files/titaxigagimamomop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4715/6903/files/agathiyar_books.pdf
    • https://cdn.shopify.com/s/files/1/0435/3359/8880/files/rozumuvapujokire.pdf
    • https://cdn.shopify.com/s/files/1/0435/7767/1843/files/gizosatuzitosabal.pdf
    • https://cdn.shopify.com/s/files/1/0430/9336/0791/files/kapixafodulanuwadutof.pdf
    • https://cdn.shopify.com/s/files/1/0431/0908/9434/files/tintin_books.pdf
    • https://cdn.shopify.com/s/files/1/0440/0100/1630/files/list_of_adjectives_and_their_synonyms.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0549/files/aadhar_card_download_without_mobile_number.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7719/files/wokexu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8679/0304/files/gitixilamapu.pdf
    • https://cdn.shopify.com/s/files/1/0437/1608/3877/files/82517061486.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000105c7.bin
21fc298548e9181f308b5c6243a515cd2210f88549ae9daddc1bba5142282ff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105C7 20524 bytes
font_01_sfnt_off00014848.bin
f9c2e04aa74d0f483c0407faa20b65a4aa845d0a0eb9ca4ac5cf84a5282d316f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14848 5092 bytes
font_02_sfnt_off00015978.bin
c0e59ea634cfd15da97054d551302dcf68e55905eaa0754e1bafb8c8f04e5bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15978 7360 bytes
font_03_sfnt_off00016dad.bin
7c4459610bc812c6c7f6b39c1bb76eb21ffc010908a462799838672caecfddf1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DAD 19264 bytes

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