Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d4b588d9c83f36f…

MALICIOUS

PDF

53.1 KB Created: 2020-08-04 04:10:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b32b451c28574551bae5291f59047add SHA-1: d7d5ffc57e03604b5c5338a8234b589b10b11ad9 SHA-256: 7d4b588d9c83f36f69d9adffce8d98d42a4e5ac29ff79d3ce168600cec7c1dd0
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 external PDF files hosted on various domains, including a known malicious redirector. The document body text and embedded links suggest a lure to disguise the malicious intent. The primary malicious URL identified is https://ttraff.cc/pify?keyword=respiratory+system+diagram+labeled+pdf, which is flagged as a malicious redirector.

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.cc/pify?keyword=respiratory+system+diagram+labeled+pdf
    • http://files.littlebrownsuitcaseministries.org/uploads/1/3/2/6/132681392/nakamoludo.pdf
    • http://files.goingtruegreen.com/uploads/1/3/0/8/130874431/maderis-kaxapupejopote.pdf
    • http://files.krutschworks.com/uploads/1/3/2/6/132681325/7908049.pdf
    • http://files.schwetjeproject.com/uploads/1/3/1/6/131606866/edda669c2.pdf
    • https://cdn.shopify.com/s/files/1/0429/1585/6550/files/bubaxa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3212/4312/files/40651455678.pdf
    • https://cdn.shopify.com/s/files/1/0436/0188/7396/files/basurikokof.pdf
    • https://cdn.shopify.com/s/files/1/0430/3192/0794/files/aristotle_and_dante_discover.pdf
    • https://cdn.shopify.com/s/files/1/0434/6281/9990/files/subnautica_blue_tablet_location.pdf
    • https://cdn.shopify.com/s/files/1/0429/5609/5644/files/lugojatozutadaxoja.pdf
    • https://cdn.shopify.com/s/files/1/0428/7217/6796/files/78049844315.pdf
    • https://cdn.shopify.com/s/files/1/0431/7826/2692/files/sumemuda.pdf
    • https://cdn.shopify.com/s/files/1/0431/9032/1313/files/28106195113.pdf
    • https://cdn.shopify.com/s/files/1/0433/4410/1544/files/38285209724.pdf
    • https://cdn.shopify.com/s/files/1/0428/6336/2204/files/gesewukip.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_off0000916b.bin
6c116db02e9168db736f85c72da824c681ae1d01b7d965238978a3a3d40c18ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x916B 5608 bytes
font_01_sfnt_off0000a474.bin
e0be5639be7273084cb5886f1939da74eff42792becc12c3ad6dbd39df4665b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA474 10268 bytes

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