Malicious PDF — malware analysis report

Static analysis result for SHA-256 78cc424e5dcc18ce…

MALICIOUS

PDF

39.2 KB Created: 2020-08-08 06:39:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5163620563301de63e78f44b7b7c04aa SHA-1: 59a288827d65bd1d8bb6449b053329b351c6fc03 SHA-256: 78cc424e5dcc18ce43c6afa67b22ff5fd6a9a70548cd95b58edfce67337139f4
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though obfuscated, contains text related to 'springboard algebra 2 answers pdf' and a URL pointing to a redirector. This suggests a phishing or scam attempt to direct users to malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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.
  • 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=springboard+algebra+2+answers+pdf
    • http://files.staceydenny.com/uploads/1/3/1/3/131380345/7430454.pdf
    • http://files.aaronmostojfeathers.com/uploads/1/3/0/8/130813366/8841914.pdf
    • http://files.pianolessonsrichmondbc.com/uploads/1/3/2/6/132696512/e397e26b3057.pdf
    • http://fuzuf.lorrainechandler.com/uploads/1/3/1/0/131070450/6592731.pdf
    • https://cdn.shopify.com/s/files/1/0431/2023/0564/files/84853606366.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/how_do_you_reset_photoshop.pdf
    • https://cdn.shopify.com/s/files/1/0434/4528/9127/files/39252914500.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/penifuno.pdf
    • https://cdn.shopify.com/s/files/1/0430/9313/1425/files/nofinavogarusi.pdf
    • https://cdn.shopify.com/s/files/1/0435/2347/3560/files/breast_cancer_awareness_coloring_pages.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/kiwunibo.pdf
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/42656549347.pdf
    • https://cdn.shopify.com/s/files/1/0430/5797/1354/files/36384828290.pdf
    • https://cdn.shopify.com/s/files/1/0440/5932/8662/files/balanced_diet_assignment.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/gufub.pdf
    • https://cdn.shopify.com/s/files/1/0431/3861/3415/files/tisikezaxadosupabunibox.pdf
    • https://cdn.shopify.com/s/files/1/0432/3675/3570/files/tirefalotes.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_off0000544b.bin
41cb2beaaa7afe666f9063ece530ff0b0bf171ca7c0517bda8fb1e7711de76eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x544B 5676 bytes
font_01_sfnt_off000067b7.bin
905d7ebd47564587e73ff9d06f2964a748db0518eaa8347bf45e15425c852a63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67B7 12180 bytes

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