Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8d8abf254f6a6c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-10 14:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b64e92e8a419765b59eba6860269b2f SHA-1: 75298008154ace9de20221d03f7d1962aef380ee SHA-256: 5a8d8abf254f6a6c847029810150b781d7551319a92e770b4e5ee8cb0e73b5d8
154 Risk Score

Malware Insights

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

The PDF contains a large number of links, many pointing to a redirector service, indicating a link farm or phishing attempt. The primary malicious URL identified is https://ttraff.cc/pify?keyword=categories+of+drugs+in+pregnancy+pdf, which is likely used to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to the same URL and other PDF links, reinforcing the malicious intent.

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=categories+of+drugs+in+pregnancy+pdf
    • http://files.healthyvasquez.com/uploads/1/3/2/8/132814276/sumenikulutib.pdf
    • http://files.zippiteeshirts.com/uploads/1/3/0/8/130813841/pusij.pdf
    • http://files.lesmarmitons-sandysprings.org/uploads/1/3/0/7/130776158/4878725.pdf
    • http://files.eightgates.co.uk/uploads/1/3/0/7/130739061/vudaxipuwim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/38884848647.pdf
    • https://cdn.shopify.com/s/files/1/0434/9906/1408/files/tigujiludiv.pdf
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/xoruretumatifefeg.pdf
    • https://cdn.shopify.com/s/files/1/0435/2727/4645/files/anexo_19_oaci_segunda_edicion.pdf
    • https://cdn.shopify.com/s/files/1/0435/7976/8995/files/the_art_of_shakespeare_s_sonnets_helen_vendler.pdf
    • https://cdn.shopify.com/s/files/1/0433/9780/8279/files/lebozidigepabud.pdf
    • https://cdn.shopify.com/s/files/1/0438/1261/8402/files/xezegun.pdf
    • https://cdn.shopify.com/s/files/1/0429/1405/4300/files/tadamatotenexaro.pdf
    • https://cdn.shopify.com/s/files/1/0437/9967/5040/files/2015233578.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/voxetevew.pdf
    • https://cdn.shopify.com/s/files/1/0431/1387/3569/files/simozudilus.pdf
    • https://cdn.shopify.com/s/files/1/0433/8152/2599/files/agile_software_development_principles_patterns_and_practices_martin.pdf
    • https://cdn.shopify.com/s/files/1/0431/8412/8151/files/segedovatoxixefasaba.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000067dc.bin
ef1ad7cf1c9b2cdd823ecb41bf7d53fd12f96256f7a0c955170874395723caf9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67DC 5300 bytes
font_01_sfnt_off000079fd.bin
b4d134e5e45586abaebe055ccad397401d5e11d8f17587e48cc95011c34fda33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x79FD 10248 bytes

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