Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7832f886e122ba…

MALICIOUS

PDF

42.3 KB Created: 2020-08-07 20:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 754123d1cc1d2d267cf385000f78f625 SHA-1: 3efa67650f7e081f7fbf5b2ab69faa5770c8a0b7 SHA-256: 3e7832f886e122ba9770a741fb9ba4e69a22aa501065bf0973eeccbda6747be5
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final malicious destination. The document body, though heavily obfuscated, contains text related to 'ncert biology class 9 pdf', suggesting a lure to trick users into clicking the malicious link under the guise of educational 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.cc/pify?keyword=ncert+biology+class+9+pdf
    • http://files.surfandsoundevents.com/uploads/1/3/0/8/130813869/7024452.pdf
    • http://files.verseapack.com/uploads/1/3/2/8/132814544/jutelufimavajote.pdf
    • http://files.onlineintimates.com/uploads/1/3/1/1/131163780/9201866.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/gungeon_iron_coin.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/40313354442.pdf
    • https://cdn.shopify.com/s/files/1/0436/6827/5353/files/41535951594.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/zeworabapaged.pdf
    • https://cdn.shopify.com/s/files/1/0427/5824/2470/files/wenuguvok.pdf
    • https://cdn.shopify.com/s/files/1/0433/0792/5654/files/belotero_hydro.pdf
    • https://cdn.shopify.com/s/files/1/0438/5298/8566/files/powomesijopema.pdf
    • https://cdn.shopify.com/s/files/1/0430/8529/9876/files/mesepirofigodituw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8858/4605/files/nabogeluze.pdf
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/92580971032.pdf
    • https://cdn.shopify.com/s/files/1/0438/2107/2541/files/print_newline_python.pdf
    • https://cdn.shopify.com/s/files/1/0437/4790/1592/files/virapese.pdf
    • https://cdn.shopify.com/s/files/1/0431/6443/4583/files/21040383315.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/61238086127.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_off00006846.bin
dc1240eee832497b83c6b7073d49843d85c3969429cd32f3a3b0536dd2aebec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6846 5692 bytes
font_01_sfnt_off00007bba.bin
fd99941e3433c0395dab23e717caf1d391e844109d8ebb256671b3605a70c74c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BBA 9608 bytes

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