Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a88d37f6a5136d0…

MALICIOUS

PDF

68.6 KB Created: 2020-10-28 00:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-28
MD5: 522b9f54259fdce893becbdbdf137689 SHA-1: 38754209247d31323ff323b022847dc6da02eca6 SHA-256: 9a88d37f6a5136d097bb69749cb5705ed5dfc5e0ba459e52167c718c0e2b284a
114 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, appears to contain text related to a Dell laptop and the malicious URL, suggesting a lure for a phishing or scam campaign. No scripts were extracted, but the presence of a malicious URL is sufficient to classify this as a phishing attempt.

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.
  • 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://cctraff.ru/123?keyword=dell+inspiron+11+3000+specs+price In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374986/normal_5f8bf58239e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f94e3a353947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392861/normal_5f97fa2085a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f87504c29eff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380867/normal_5f91085d24f5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f8b155bb6a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f909ace724f1.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://uploads.strikinglycdn.com/files/dd02d67a-e07d-4a49-9a31-b58eb542dd68/19877433478.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1eeda5fc-5245-4664-85ab-a1cc91f5bb47/tedovidefuxupogagaluxos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/361f3739-1cee-49b2-aa78-ea5aa47fb08c/vozuxujufopuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3366f51-cc13-4930-8d89-60a4e22cf4b2/33732798220.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/xuzarakixireliwusejifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6068/1109/files/badivatete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/0981/3923/files/realidades_1_textbook_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2535/6184/files/89443185373.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0888/7454/files/vokasevebapabumitulas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000befd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEFD 4780 bytes
SHA-256: f38ae7e82fa008b2aa882716360fb9416653337c9bcf8e57f9af60b39b4e0b38
font_01_sfnt_off0000cf3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF3F 11860 bytes
SHA-256: 7f5080d81ebb19a124314b8e291a73f36ce814466299bbf9d151476e43d8462d
font_02_sfnt_off0000f6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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