Malicious PDF — malware analysis report

Static analysis result for SHA-256 0522187822db0990…

MALICIOUS

PDF

38.9 KB Created: 2020-08-20 12:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a72bacbc069292fac41390d9937ac95 SHA-1: bb1d55e49f53c89ff2d99dba1c03cb32217871f7 SHA-256: 0522187822db09909501e5f4d75ab4c23f00f6442c5da9cbb251d68b4ce84437
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO abuse tactic. One prominent URL, https://ttraff.com/pify?keyword=platform+film+ajay+devgan+video+movie, is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, indicating its likely purpose is to redirect the user to malicious infrastructure. 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.com/pify?keyword=platform+film+ajay+devgan+video+movie
    • http://files.swcfcu.org/uploads/1/3/2/6/132681767/01050fe51994baf.pdf
    • http://files.wisconsinlitmap.com/uploads/1/3/1/8/131860204/c41589789.pdf
    • http://files.extremefg.com/uploads/1/3/1/0/131071315/dotalof.pdf
    • http://files.senisilatcapetown.co.za/uploads/1/3/1/8/131856188/2631514.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8482/4222/files/98714859407.pdf
    • https://cdn.shopify.com/s/files/1/0433/5956/8027/files/graphing_equations_slope_intercept_form_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0436/4809/0270/files/factoring_with_fractional_exponents_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0440/2708/4965/files/vexodinasenarepudezawawe.pdf
    • https://cdn.shopify.com/s/files/1/0427/9471/3244/files/33525950227.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/72310068112.pdf
    • https://cdn.shopify.com/s/files/1/0434/0318/2231/files/c_is_digit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6074/6647/files/21407924269.pdf
    • https://cdn.shopify.com/s/files/1/0430/7252/0353/files/famibizokozakivis.pdf
    • https://cdn.shopify.com/s/files/1/0436/7237/1350/files/ruvipazejolugekivejaverib.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005a00.bin
06c8a0285d54fec113731253de353c3f024c56364d7d66f1bfbbb4b118061324
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A00 5288 bytes
font_01_sfnt_off00006bf8.bin
303de49a0df4eb0f1f9c0228fb303d18ed2533c1fca2e64bfc6b9442421d943a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BF8 10236 bytes