Malicious PDF — malware analysis report

Static analysis result for SHA-256 52ddbae92311d9bc…

MALICIOUS

PDF

61.3 KB Created: 2020-10-09 13:19:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 7d8f1766b2cfb1491926a62481e291b9 SHA-1: 351aada21174a9192a0356fdb179abe683f9e3a1 SHA-256: 52ddbae92311d9bcd59918202e7862ce2060c207e5fea66ea21ce76c9bfdea8a
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a critical heuristic firing for linking to known malicious redirector infrastructure. The embedded URL 'https://cctraff.ru/strik?keyword=syntaxerror+missing+before+statement+%2540%2528+shell+mongoimport' is the primary indicator of malicious intent. While the document body contains garbled text, it also includes this URL and references to 'shell mongoimport', suggesting an attempt to exploit or download further content. The presence of a large number of external links, many pointing to Shopify, indicates a potential link farm or content stuffing technique to obscure the malicious URL.

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://cctraff.ru/strik?keyword=syntaxerror+missing+before+statement+%2540%2528+shell+mongoimport In PDF document text
    • http://files.uccloverdale.org/uploads/1/3/0/7/130775850/1713982.pdfIn PDF document text
    • http://files.stpaultomahawk.org/uploads/1/3/1/3/131381204/paxabazotuxozif.pdfIn PDF document text
    • http://liweki.chicagolanditalians.com/uploads/1/3/1/4/131453194/voxadu_bamurobonorekiv_poboguv.pdfIn PDF document text
    • http://files.tamasbanki.com/uploads/1/3/2/6/132681481/bomonij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5736/0279/files/nevada_construction_business_and_law_manual_audio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2746/6904/files/sitozolosinubokelipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6379/5096/files/ebony_blade_skyrim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9788/2773/files/tai_chi_for_beginners_and_the_24_forms.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5443/3183/files/holy_angels_st_albans_vt.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7971/9317/files/dragonvale_hack_android_no_verification.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/2586/1274/files/727774776.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7421/5331/files/manual_liquid_filling_machine_price.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3910/4929/files/greenworks_40v_blower_review.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5431/files/lubeletetekujunekowolit.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0E 5928 bytes
SHA-256: fafadaec71b99abcd16dc3b06c633a3e36ce9d5cb809cdf8911c07cbbff76a8f
font_01_sfnt_off00009013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9013 15800 bytes
SHA-256: 0bc570b955d56481c03098cd9569c93863d5bd44bff2894bcf637c9518faf9b8
font_02_sfnt_off0000c0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F7 16440 bytes
SHA-256: 577e5396b07b59de365e5405c12beae5ef77009784c37567d718475e489eb1b2
font_03_sfnt_off0000d6ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6EF 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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