Malicious PDF — malware analysis report

Static analysis result for SHA-256 534223b9c247448b…

MALICIOUS

PDF

42.0 KB Created: 2020-09-01 19:09:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 975f04c631899820ade3d6b1eb4d309e SHA-1: f1609e132185b8a6f8abe3761fef9b666264be95 SHA-256: 534223b9c247448b1268b43d82a457d4b89cbf5f25e3eeda1ded8a0c36185141
150 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for downloading software, specifically mentioning 'whatsapp for blackberry 10 apk 2019'. This suggests a phishing or social engineering attack aimed at tricking users into visiting malicious sites.

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.ru/wix?keyword=whatsapp+for+blackberry+10+apk+2019
    • https://cdn.shopify.com/s/files/1/0437/7329/6801/files/jawusewuva.pdf
    • https://cdn.shopify.com/s/files/1/0430/3480/4375/files/95761266681.pdf
    • https://cdn.shopify.com/s/files/1/0433/7722/9982/files/zabukotajelojatulid.pdf
    • https://cdn.shopify.com/s/files/1/0433/8168/6439/files/juralapuwawibugobilunitub.pdf
    • https://cdn.shopify.com/s/files/1/0449/4390/0827/files/alimentos_ricos_en_fibra_para_estreimiento.pdf
    • https://cdn.shopify.com/s/files/1/0435/9513/7187/files/4494618479.pdf
    • https://cdn.shopify.com/s/files/1/0434/5335/0055/files/panama_city_beach_water_temp.pdf
    • https://cdn.shopify.com/s/files/1/0461/8980/5731/files/vuzapaxorepamewev.pdf
    • https://cdn.shopify.com/s/files/1/0428/9613/0211/files/87793437572.pdf
    • https://cdn.shopify.com/s/files/1/0439/8632/1566/files/patutofakudogojalim.pdf
    • https://static.usrfiles.com/ugd/89064d_0fb91e80e9944d76b81550fc1f10f058.pdf
    • https://static.usrfiles.com/ugd/b8c837_0775ccb3b10543b584732e3dc8571d0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4a0729e245046edae04b76f9e289909.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/
    • https://cdn.shopify.com/s/files/1/0449/4390/0827/files/alimentos_ricos_en_fibra_

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060eb.bin
3953f7cc248497dc6eca5ee4ccd8b5aae58315ff8b22eb1097a51dc5794f9ecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60EB 5904 bytes
font_01_sfnt_off00007519.bin
bfe904a2f68581ed035c1b480316b061947f13270bdd567714b69469f848dbd1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7519 10596 bytes

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