Malicious PDF — malware analysis report

Static analysis result for SHA-256 215514d80fbf70f0…

MALICIOUS

PDF

51.1 KB Created: 2020-07-30 16:56:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0481529b5e8d61edbd91c5494757a843 SHA-1: b9fb3a4e496f5375c876439e633cf624ab5195b9 SHA-256: 215514d80fbf70f009532d8628c3ee42d9bcc06a8eb539b5b2f2b94e9724eaa6
150 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link redirects to a known malicious domain (ttraff.ru). This indicates a social engineering tactic to drive traffic to potentially harmful sites. The ML classifier also strongly flagged this PDF as malicious.

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/pify?keyword=theories+of+deviance+pdf
    • http://files.ourlavenderhearts.com/uploads/1/3/0/9/130969470/1252873.pdf
    • http://files.liquidgoldbfs.com/uploads/1/3/0/8/130814926/divujop_ravil_kurofumekewo.pdf
    • http://files.yourchartersoffreedom.com/uploads/1/3/1/4/131453034/2488600.pdf
    • http://files.essenceofself.com/uploads/1/3/0/8/130874161/disoxiwi-vovoxarediz.pdf
    • http://files.trippershollow.org/uploads/1/3/0/7/130740464/7889371.pdf
    • https://cdn.shopify.com/s/files/1/0434/9391/6837/files/67717536383.pdf
    • https://cdn.shopify.com/s/files/1/0431/8114/6280/files/pigamerekaziluvalemulugog.pdf
    • https://cdn.shopify.com/s/files/1/0430/7084/9181/files/nixuvixik.pdf
    • https://cdn.shopify.com/s/files/1/0434/0996/5212/files/19095061164.pdf
    • https://cdn.shopify.com/s/files/1/0431/8245/7000/files/87723693177.pdf
    • https://cdn.shopify.com/s/files/1/0429/1277/6351/files/86222643416.pdf
    • https://cdn.shopify.com/s/files/1/0431/5840/5275/files/visumofesokop.pdf
    • https://cdn.shopify.com/s/files/1/0429/8807/7209/files/59973834006.pdf
    • https://cdn.shopify.com/s/files/1/0440/6929/0149/files/dimenagodon.pdf
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/sajesumopepujupelozopejar.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_off00008c88.bin
9e4e657e6b73ced4e5a10ec8bcc27923e066146465f409f86b7a77ff8f079eac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C88 4928 bytes
font_01_sfnt_off00009d3e.bin
df32886a4cc30be2329c84f1c34222c2a8f024e61a2acc9d02e9e51ac0936b51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D3E 9928 bytes

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