Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1811919e84d6b30…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 09:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba9703bf75a6066357ca28e9730fa936 SHA-1: 6f8b1b174ca1f9ba886ef389ec745a10887bd18f SHA-256: e1811919e84d6b30ec26facd57c917272fa2835c9ff5d0a37a8bbb18220d340a
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Android studio course duration' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, including the malicious one, indicates a link farm strategy to improve search engine ranking and distribute malicious content.

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.com/pify?keyword=android+studio+course+duration
    • http://ravojidi.bibliognostic.com/uploads/1/3/1/4/131406532/zutan.pdf
    • http://lelog.gracesaunders.com/uploads/1/3/1/3/131380086/nolisefadanexu-pijafej-puxitejomegag.pdf
    • http://files.gracehouseministry.com/uploads/1/3/2/6/132695280/jofinepuda.pdf
    • https://cdn.shopify.com/s/files/1/0433/9151/6826/files/mebosatujilam.pdf
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/98437083339.pdf
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/75500462195.pdf
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/41680926921.pdf
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/wibeli.pdf
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/95230405501.pdf
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/kerukexifab.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007348.bin
fbb52bad8e91ebda532e56e0441cb498ee86655abac7f7dc58af7543769d2ced		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 4888 bytes
font_01_sfnt_off000083e9.bin
4d14df22f1f0818299ee221effb2a0a1f3f56c7a652dea2a84292577ad3c24ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 10328 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.