Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a29960636c7651d…

MALICIOUS

PDF

41.5 KB Created: 2020-08-12 11:10:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: abb55373c20432351559f7c38112f9d0 SHA-1: e536b985c8e0d15fca0bd020fd28a8ca0ed47601 SHA-256: 2a29960636c7651d87ffe76fc2314a0c17a87dd7ba8aaab182306669303717cd
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as an academic project. The PDF_MALICIOUS_REDIRECTOR_LINK heuristic firing confirms the link leads to known malicious infrastructure. The ML_NYX_PDF_MALICIOUS classifier also strongly indicates malicious intent. The document body, though heavily obfuscated, contains the malicious URL, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.com/pify?keyword=food+adulteration+investigatory+project+class+12+pdf
    • http://files.emeraldowlproductions.com/uploads/1/3/1/3/131383958/9512461.pdf
    • http://files.innerdolphinawakening.com/uploads/1/3/1/6/131606035/kumuvefajolen.pdf
    • http://files.meetthestephans.com/uploads/1/3/1/1/131164558/6fdb17e.pdf
    • https://cdn.shopify.com/s/files/1/0430/7478/1338/files/39257088572.pdf
    • https://cdn.shopify.com/s/files/1/0438/0911/2226/files/sleepyclasses_sociology.pdf
    • https://cdn.shopify.com/s/files/1/0434/6671/9385/files/eshop_code_generator.pdf
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/calendario_serie_a_18_19_sky.pdf
    • https://cdn.shopify.com/s/files/1/0440/5601/9109/files/cambridge_pet_test.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/jifanigez.pdf
    • https://cdn.shopify.com/s/files/1/0435/0948/1624/files/muxowejivujo.pdf
    • https://cdn.shopify.com/s/files/1/0432/8436/5476/files/pdf_capitalismo_industrial.pdf
    • https://cdn.shopify.com/s/files/1/0432/4343/8244/files/89887151259.pdf
    • https://cdn.shopify.com/s/files/1/0429/5501/4298/files/22596051337.pdf
    • https://cdn.shopify.com/s/files/1/0432/2862/7107/files/balanis_antenna_theory_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/62353775241.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_off00005f76.bin
8f3c941c75a36f832fb4ab54864d30c00d0e4240eddec96dbc307a4878135140		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F76 5700 bytes
font_01_sfnt_off0000731a.bin
6509664bec45794539485be4d9a4c29136fbda8eea2519970505eac593561acf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x731A 10888 bytes

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