Malicious PDF — malware analysis report

Static analysis result for SHA-256 57c5388be819adb9…

MALICIOUS

PDF

58.9 KB Created: 2020-08-09 22:46:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0052c9a72393ea4c5528727b2745e9c5 SHA-1: 6483a137d6358f31349a1efc15a4675044f91568 SHA-256: 57c5388be819adb98c854154148a6de06c067db08295259eb0d689dc092c992e
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. The document body, though heavily obfuscated, contains the URL for the malicious redirector. This indicates a phishing or scam attempt designed to lead the user to malicious infrastructure.

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=centrifugal+blower+impeller+design+pdf
    • http://files.lafsgraduation.com/uploads/1/3/1/3/131379594/33ac04c.pdf
    • http://files.theimaginativemusicstudio.com/uploads/1/3/0/8/130813511/9789693.pdf
    • http://files.shop.dannysrods.com/uploads/1/3/1/4/131453577/xevepifezoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/1415/2607/files/vesap.pdf
    • https://cdn.shopify.com/s/files/1/0435/2668/4824/files/97428561945.pdf
    • https://cdn.shopify.com/s/files/1/0431/8589/7627/files/25470153307.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62374455636.pdf
    • https://cdn.shopify.com/s/files/1/0434/8330/0005/files/99474310724.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7614/files/kaneb.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7129/files/89616009172.pdf
    • https://cdn.shopify.com/s/files/1/0438/9447/2856/files/vetuximaperopilukuzozomiz.pdf
    • https://cdn.shopify.com/s/files/1/0432/5048/3368/files/32603494139.pdf
    • https://cdn.shopify.com/s/files/1/0431/2258/9853/files/10079560306.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/21635904030.pdf
    • https://cdn.shopify.com/s/files/1/0431/6640/0673/files/gesanofikifagu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0352/6820/files/sailor_moon_manga_completo.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_off0000a7e3.bin
7515bb555f42216041edb914fdc3b68ddc59a30e8755bcaf9f44fb93f0860366		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA7E3 5500 bytes
font_01_sfnt_off0000ba8a.bin
889309a8328306b5e4a0f3408374bf2e83ad1c250047dbade1f275b4759d9263		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8A 10400 bytes

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