Malicious PDF — malware analysis report

Static analysis result for SHA-256 d722d4668d5a7495…

MALICIOUS

PDF

41.9 KB Created: 2020-07-10 14:01:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dbe9b52d5af9b670331d21693e29c7f6 SHA-1: bc4743f794472051fd341ecfb0cd84d087b430a0 SHA-256: d722d4668d5a74952876ee011a911a20d19e97c825842d243c1e3edb88b8ec38
152 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. One critical heuristic identified a link to a known malicious redirector infrastructure, specifically 'ttraff.com', which is used to obscure the final destination. The document body text, though partially garbled, includes the search query 'church of christ bible study lessons pdf', suggesting a lure to attract users to click on the 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.com/pify?keyword=church+of+christ+bible+study+lessons+pdf
    • http://files.graceub.com/uploads/1/3/2/6/132681404/6733747.pdf
    • http://files.morjimcocopalms.com/uploads/1/3/1/3/131384789/2a0aea98a146c0c.pdf
    • http://files.victoriakileart.com/uploads/1/3/0/8/130814735/lilapozizopepofagen.pdf
    • http://files.truewealthfg.com/uploads/1/3/2/7/132710687/migejowo.pdf
    • http://files.livepeabody.com/uploads/1/3/1/4/131438234/jekife_duwabusene_xinuw_jevibipon.pdf
    • http://files.busybeeorganize.ca/uploads/1/3/0/9/130969004/gojebifazalomo-maxurapokenoxo.pdf
    • http://files.clovercaredoulaservices.com/uploads/1/3/0/9/130969987/d361afcc7f721c.pdf
    • http://files.javaromaroasters.com/uploads/1/3/1/4/131437699/gujetako.pdf
    • https://pogorokuve.files.wordpress.com/2020/07/88704550306.pdf
    • https://talugaka.files.wordpress.com/2020/06/61952883344.pdf
    • https://fububoxoludi.files.wordpress.com/2020/07/pijadotelajab.pdf
    • https://telomema.files.wordpress.com/2020/07/20391403865.pdf
    • https://genonirog922543524.files.wordpress.com/2020/06/35538656756.pdf
    • https://gakazorex.files.wordpress.com/2020/06/wabewodepavax.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/23299766122.pdf
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/dumisawademubanativi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/51106899687.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/temufaxilagig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fezusagofetivori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0107/7142/files/zawogazolavud.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kufanagapaxo.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_off000064bf.bin
069d92d0439a15e30a9b9ccd5aaae8e054a7e3f4b94f68978202ea6b0e8cd0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64BF 5180 bytes
font_01_sfnt_off00007656.bin
f882c9d3ac298bf159659b35ef5e2e0923824b81be76ff1c208ac3322b723772		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7656 10800 bytes

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