Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fafac6617a1fbcf…

MALICIOUS

PDF

46.6 KB Created: 2020-08-07 00:31:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c55fb651b9014f9e132cd4f86d4a61a0 SHA-1: 8eb2e01a9275b8508f882c087735d908f115198c SHA-256: 3fafac6617a1fbcffff1e56d0bea51dbfd14b423a46c44350aa4740ab43089c7
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.ru/pify?keyword=aditya+hrudayam+stotram+in+telugu+pdf+download'. This indicates the document's primary purpose is to redirect users to potentially harmful content. The presence of a large number of external PDF links, many hosted on cdn.shopify.com, suggests a link farm or SEO poisoning tactic to improve search engine ranking for malicious content. No scripts were extracted from this sample.

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=aditya+hrudayam+stotram+in+telugu+pdf+download
    • http://files.zamboangueno.com/uploads/1/3/2/6/132682471/8431284.pdf
    • http://files.columbiaanimalclinic.com/uploads/1/3/1/4/131437680/a34790e10666ecd.pdf
    • http://gekup.dkgca.org/uploads/1/3/0/8/130814229/nejenujikugago.pdf
    • https://cdn.shopify.com/s/files/1/0432/9232/8102/files/kebezukijovulinogaj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/a_perfect_circle_passive.pdf
    • https://cdn.shopify.com/s/files/1/0427/5906/1670/files/85924261793.pdf
    • https://cdn.shopify.com/s/files/1/0438/6694/7744/files/33719439451.pdf
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/47501562647.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/78549170372.pdf
    • https://cdn.shopify.com/s/files/1/0430/6901/4165/files/bulleh_shah_books.pdf
    • https://cdn.shopify.com/s/files/1/0439/5424/1694/files/retaradegufibepokikifu.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/46859753756.pdf
    • https://cdn.shopify.com/s/files/1/0432/5248/2208/files/talemumomumen.pdf
    • https://cdn.shopify.com/s/files/1/0435/7799/9519/files/39030418877.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005cfc.bin
f6af0d9985b710d83012db2b402a6395fec5db9bd4ee396b7580b6ca09abeafc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CFC 5640 bytes
font_01_sfnt_off0000701e.bin
f64e8d737625e852efb03a544acc4271af656cb88fb2dec9971ea8ef9fcd200b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x701E 4336 bytes
font_02_sfnt_off00008068.bin
a372a2ff6d66f7be67717b0051b5cfed6582dc53fe8ebe4559b5ff8fab1c438d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8068 14284 bytes

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