Malicious PDF — malware analysis report

Static analysis result for SHA-256 4abfc9808f35a921…

MALICIOUS

PDF

46.9 KB Created: 2020-07-30 14:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a1c01a9be7e12786d0fe8207259bf61 SHA-1: e39fae7284153211ac3a0cc534c7e0e292cbe974 SHA-256: 4abfc9808f35a921c1ba444005336404f3ed0d16cc4c5dda1c7c7eef8cf5d5f3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 Malicious Link T1059.001 PowerShell

The PDF file contains numerous links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to academic material. The primary malicious link is https://ttraff.cc/pify?keyword=automata+theory+languages+and+computation+solutions+pdf, which likely leads to further malicious content. The presence of a link farm suggests an attempt to game search engine results for malicious distribution.

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=automata+theory+languages+and+computation+solutions+pdf
    • http://files.ericgrantowens.com/uploads/1/3/1/3/131380493/e28dd5.pdf
    • http://files.stokemodelclub.co.uk/uploads/1/3/2/8/132814071/kasixazu-nimuj-lilamo-xuzolazi.pdf
    • http://files.elizabethsampson1.com/uploads/1/3/0/7/130739204/2d73b49.pdf
    • http://files.elizabethsamp
    • https://cdn.shopify.com/s/files/1/0433/6405/7247/files/lozimenagejo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/raxano.pdf
    • https://cdn.shopify.com/s/files/1/0432/2469/4942/files/nexetifu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8125/2512/files/xomabowezizerigodi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1294/0188/files/69479335032.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/2002/files/2599425977.pdf
    • https://cdn.shopify.com/s/files/1/0434/3640/8982/files/wopudu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2433/4498/files/25026897949.pdf
    • https://cdn.shopify.com/s/files/1/0434/0521/3847/files/72239210468.pdf
    • https://cdn.shopify.com/s/files/1/0436/4481/3470/files/45385173698.pdf
    • https://cdn.shopify.com/s/files/1/0431/0577/9878/files/tebamokiverebetomofokej.pdf
    • https://cdn.shopify.com/s/files/1/0429/3633/6540/files/wavulusidirijaguguk.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/60537496414.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_off00007065.bin
2f35676656ae3c73d8ffa1cda95297501fb521a8dc9b970a9b9446cbe1ed3aef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7065 5540 bytes
font_01_sfnt_off0000831e.bin
1b3c1a42bd5a410ad83541f0442ac94bdca9adad3e0048a06c5636e3e627d7e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x831E 13576 bytes

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