Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ce2e8bf916e63b4…

MALICIOUS

PDF

67.4 KB Created: 2020-11-11 15:08:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 8beeae5aedf35961a65627764b2302f5 SHA-1: 9afefdf3845113fd17e2102c79ede37dea542622 SHA-256: 1ce2e8bf916e63b43847daeb414a3a3b34dcacaba82dc4503744c8cd05fdd72e
176 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an external URI pointing to a suspicious domain, trafftec.ru, which is likely part of a phishing campaign. The heuristic 'SE_CALLBACK_LURE' suggests the document is designed to trick users into calling a number in a deceptive context, further supporting a phishing or scam attempt. The presence of numerous external links, some leading to benign content and others to unknown or suspicious destinations, indicates a potential link farm or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafftec.ru/aws?utm_term=thinkcentral+k-6+login+teachers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4408352/normal_5f9bbdbae8362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461748/normal_5fa16f9039426.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457005/normal_5fa1dd2b43bc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383918/normal_5fa7849f1f128.pdfIn PDF document text
    • https://jufavufopu.weebly.com/uploads/1/3/4/3/134340263/771568.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e80d03-27f8-49f9-8a8e-6382fc326da4/6630142420.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6094eab3-9a07-4e2c-a5fc-80e838d40094/jabobixesosujugap.pdfIn PDF document text
    • https://s3.amazonaws.com/jolufozo/rosenthal_crystal_paperweight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e9c326-32ba-4f58-90d7-410b5355355c/21131992387.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b02874c2-3611-4eda-b4c6-17eb475b314b/real_spell_casters_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e888ba9-a3d5-41c6-9d41-586bec7fc40f/gesotafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04a6b1f-6d60-41db-8957-3500940d80d0/wedileronupavowopew.pdfIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/pumukedozolov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/827289e7-9abc-4513-bd3d-7781a4f420ec/lokaluv.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_off0000cbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBC8 5260 bytes
SHA-256: be55d115e3275590d914b4fd9fc5f79299ee377b84562bb0c4d60cfd99184708
font_01_sfnt_off0000ddab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAB 10372 bytes
SHA-256: 558fe0d9e506e27edff420c60d639d78f3d19c3c4e300e1482a4dbe545c92965

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