Malicious PDF — malware analysis report

Static analysis result for SHA-256 d98a284d9690d4ff…

MALICIOUS

PDF

34.9 KB Created: 2020-10-08 03:59:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9292baab4c891ab82d8e61e6359e9c43 SHA-1: f8f54cd6eb5d8e4de35bc000cf9c5cc2795f3d57 SHA-256: d98a284d9690d4ff75aa8922fbcea1d7fb52944d39c275e39f14e7d66c9bcf46
174 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML_NYX_PDF_MALICIOUS classifier also strongly flagged this file. The document body, though partially obfuscated, contains URLs that are part of a link farm, suggesting an attempt to drive traffic to malicious sites. The SE_CALLBACK_LURE heuristic suggests a potential phishing or scam pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ggtraff.ru/strik?keyword=the+postman+always+rings+twice+characters In PDF document text
    • http://files.deloriscollins.com/uploads/1/3/0/7/130740443/6820a.pdfIn PDF document text
    • http://files.channelcenter9.com/uploads/1/3/1/3/131379266/4968225.pdfIn PDF document text
    • http://reditipos.jansenville.com/uploads/1/3/2/6/132682701/2412189.pdfIn PDF document text
    • http://soneme.georgeflcharlesairport.com/uploads/1/3/2/6/132681294/geronurapefa.pdfIn PDF document text
    • http://rogudidun.vibrationalinstitute.com/uploads/1/3/1/4/131454950/4218353.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0754/8326/files/period_3_review_packet_answers_apush.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3976/0295/files/which_president_said_im_not_a_crook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/tinidakogusekoxaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8129/7820/files/nusineso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4285aac-c94a-4633-890a-2cde6e128226/sijenizekixoxafido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1020f440-2189-4a58-87ed-abe7f02e0266/xikowalozizepepopuvukekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/068ab080-0bf8-4cbf-9b6d-921acd8608e8/21166040890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7ff690-ffaf-47a1-b0e3-afd6a2d5e347/25898352240.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7863537-50aa-4a09-a01a-8a727fc8f18f/82705011879.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B07 5488 bytes
SHA-256: ec2ca46584e73e103ec9518d44f2f1719bb18fe5dce37ec619eaad3e5a5b7e30
font_01_sfnt_off00005d9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D9E 9752 bytes
SHA-256: 5cfa0c3cae2667767dbb1f0c3d676898e20cc087bc263ad1183605fbda34260d

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