Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22a1878dfb27d00…

MALICIOUS

PDF

33.3 KB Created: 2020-08-04 22:53:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a9bfa4108631dd239160bd2213be0e5f SHA-1: e87b90c89b53b5d6f9268a8a9ff2c5f21a966719 SHA-256: e22a1878dfb27d00beafd240c3d0634e056143133413878079ba9ec2202db345
150 Risk Score

Malware Insights

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

The PDF contains numerous links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text related to psychology and quality of life, likely as a lure. The heuristic firings confirm the presence of malicious redirector links and a link farm, indicating an attempt to drive traffic to malicious sites. No scripts were extracted from this sample.

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.cc/wb?keyword=psicologia%20de%20la%20salud%20y%20calidad%20de%20vida%20pdf
    • http://files.jlafabrication.com/uploads/1/3/1/4/131438495/2988019.pdf
    • http://files.mrzdrake.com/uploads/1/3/1/6/131607163/7849334.pdf
    • http://files.universityroadhouse.com/uploads/1/3/1/3/131383383/d4b9f16a274.pdf
    • https://cdn.shopify.com/s/files/1/0434/7556/6749/files/23954040017.pdf
    • https://cdn.shopify.com/s/files/1/0438/2828/1506/files/kikemasajeruzamadikinedow.pdf
    • https://cdn.shopify.com/s/files/1/0427/7692/0220/files/54353426248.pdf
    • https://cdn.shopify.com/s/files/1/0434/9201/6280/files/kowasigibopufonol.pdf
    • https://cdn.shopify.com/s/files/1/0429/5553/8591/files/99261139874.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/36316216581.pdf
    • https://cdn.shopify.com/s/files/1/0428/6568/8743/files/29212575472.pdf
    • https://cdn.shopify.com/s/files/1/0432/8475/8696/files/baribanof.pdf
    • https://cdn.shopify.com/s/files/1/0431/6073/1803/files/lowes_livingston_tx.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/wumufesus.pdf
    • https://cdn.shopify.com/s/files/1/0436/0595/0626/files/60125063833.pdf
    • https://cdn.shopify.com/s/files/1/0430/7448/6421/files/40341959720.pdf
    • https://cdn.shopify.com/s/files/1/0430/0288/8351/files/nuxefoxuroruxunidaran.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_off000045e6.bin
4ab1e6d90f3588106a88529ac41280c17a7e564d2ea9dc7a039553b0d9f27f07		 pdf-font-stream PDF embedded font (sfnt) at offset 0x45E6 5392 bytes
font_01_sfnt_off00005865.bin
d41d3155e7c19e42883562097a3265be96f33d158b129a9b4d87980e7f616b2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5865 9432 bytes

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