Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b4155095a86205…

MALICIOUS

PDF

40.4 KB Created: 2020-08-12 23:31:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d9edaa698f37feaf561e412c6a2b0ca SHA-1: cdd189ec1a8cd8adcdb6ceb953288a090d1c9c14 SHA-256: d5b4155095a862050eb3ca6aac02bf71a6c99f73929b01f9da2867352f39513f
152 Risk Score

Malware Insights

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

The PDF document is identified as malicious due to its inclusion of links to known malicious redirectors. It also contains a large number of SEO-optimized links, many pointing to Shopify domains, which is a common tactic for distributing malicious content. The document body text, while appearing to be a catalog, is a lure to encourage users to click on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=catalogo+de+abrigos+price+shoes+2020+pdf
    • http://pelivep.redmondacademy.org/uploads/1/3/1/8/131858540/sevabupabuzage-sagigipifugo.pdf
    • http://files.celebrationcatering.net/uploads/1/3/1/1/131163736/kutenuzagibaselu.pdf
    • http://files.soulography1111.com/uploads/1/3/0/7/130739081/098b7390.pdf
    • http://files.hairqueenmd.com/uploads/1/3/1/0/131070904/porevapolejedo.pdf
    • http://mubegun.treeoflifementoring.com/uploads/1/3/0/7/130738970/7028980.pdf
    • https://cdn.shopify.com/s/files/1/0434/1779/6770/files/fewebajumupomevolu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9432/7961/files/78986249290.pdf
    • https://cdn.shopify.com/s/files/1/0432/7417/4622/files/gobalebidov.pdf
    • https://cdn.shopify.com/s/files/1/0431/3684/3933/files/tekene.pdf
    • https://cdn.shopify.com/s/files/1/0435/6174/6595/files/patas.pdf
    • https://cdn.shopify.com/s/files/1/0433/8925/5847/files/wuwev.pdf
    • https://cdn.shopify.com/s/files/1/0433/9941/3925/files/tatoduti.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0536/files/8372960209.pdf
    • https://cdn.shopify.com/s/files/1/0431/1416/8480/files/nudimaxozokutusidowu.pdf
    • https://cdn.shopify.com/s/files/1/0437/4308/4705/files/english_worksheets_for_kindergarten_2.pdf
    • https://cdn.shopify.com/s/files/1/0427/9618/7815/files/favofamiluwodedudi.pdf
    • https://cdn.shopify.com/s/files/1/0437/1480/5914/files/wing_chun_wooden_dummy_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0438/1753/3597/files/advanced_java_tutorialspoint.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_off00005a59.bin
24194e6aa6f0b23ce933631b0ce6ef4b2645c30d1c0127521ec2303a6eb0b76b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A59 5736 bytes
font_01_sfnt_off00006dd8.bin
10cd41b06d86714a3dbf464b56b3e400187458258dd7ab0728c3995f6c29bbfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DD8 11928 bytes

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