Malicious PDF — malware analysis report

Static analysis result for SHA-256 52a3941d55962d8a…

MALICIOUS

PDF

37.6 KB Created: 2020-08-29 07:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dc616a97a138cf347ef5b4b48b1d831 SHA-1: bebd7e76feea0724ce00f6ec02807639523fb71d SHA-256: 52a3941d55962d8ad39a1b7df2bcae12f5f40529010c1dc1bbd9a9cb73d91d2b
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, disguised with a movie title. This suggests a phishing or SEO poisoning attack. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms the malicious nature of the embedded URL. The PDF also contains a large number of external links, indicative of a link farm strategy.

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/wix?keyword=los+juegos+del+hambre+sinsajo+parte+2+espa%25C3%25B1ol+latino+repelis
    • https://static.usrfiles.com/ugd/b8c837_892a9f32df13495b9abec32675d6c7e3.pdf
    • https://static.usrfiles.com/ugd/b8c837_bf72fc765e04470a8f2e65bb3ff3554b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ef4d5570666d472f95499c01eed5264e.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53059057271.pdf
    • https://cdn.shopify.com/s/files/1/0429/8869/9802/files/kevogubumojiwul.pdf
    • https://cdn.shopify.com/s/files/1/0444/8436/2407/files/english_conversation_in_interview.pdf
    • https://cdn.shopify.com/s/files/1/0428/6208/4262/files/potira.pdf
    • https://cdn.shopify.com/s/files/1/0430/4535/5674/files/73718354041.pdf
    • https://cdn.shopify.com/s/files/1/0434/0583/6444/files/bikenusorimemadi.pdf
    • https://cdn.shopify.com/s/files/1/0435/0102/7493/files/zeborutapifixe.pdf
    • https://static.usrfiles.com/ugd/b8c837_7a793dcd6ec041db9c7b166b37aaf74c.pdf
    • https://static.usrfiles.com/ugd/b8c837_ee54e5af58e14636a35fe75f85312b15.pdf
    • https://static.usrfiles.com/ugd/b8c837_b163dd7a12994e479ffc31d4ffef78a0.pdf
    • https://static.usrfiles.com/ugd/b8c837_17bd92d207f64c118ff2cb3aafd13f8f.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_off00004ecc.bin
cd258654d80f47df3ff1f72d28ae0f72a6ae2ecd9e5981d3cad6eecb2e1de331		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4ECC 5872 bytes
font_01_sfnt_off00006256.bin
2507367e97e4ff74466100e7862aa217a136bd86a4d769775a1baa47932563d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 10984 bytes

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