Malicious PDF — malware analysis report

Static analysis result for SHA-256 80218bf1e582f330…

MALICIOUS

PDF

37.0 KB Created: 2020-10-30 22:11:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 90904aa00c65bc23f3a716df12ab4436 SHA-1: b6fc5c889abe8038df18ab00a92a3304ff843335 SHA-256: 80218bf1e582f330715791ba037d3cf4615a1e2d0156876d3aa48b71f6de9bcd
94 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a redirector infrastructure, which is a strong indicator of malicious intent. The document body, though heavily obfuscated, contains the same URL, suggesting it is the primary lure. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, but the presence of a malicious redirector URL points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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.link/123?keyword=geekbench+apk+4.4 In PDF document text
    • https://bipasakugerada.weebly.com/uploads/1/3/4/3/134350286/e524a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379837/normal_5f96707bb4056.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/9653445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373753/normal_5f8ea731dddc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/warapagefasovi/ninozefimufafub.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/la_campanella_liszt_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/zuguvoxoki/danexosoxubutapepefuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f314e9ac-5680-411a-ad05-0832b319d625/57724076323.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/3860/2902/files/personalised_birthday_napkins_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/366d565a-5e58-4a20-b9db-4482de63ded8/gefojivigapu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/841deaf3-090a-4dcf-a7dd-7b594cc4da95/tupezuranidunas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90d5e46b-cd44-4aa9-9515-c24c8d1c6455/85423895576.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2328/9496/files/pinabesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a3cc463-ca74-4538-9805-62e82d94c9e7/lamalemulusukowirifiku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/020b72e6-55d1-44de-97d7-1da6963441f6/xotodepirajixumijedugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb30897-6d66-462a-9371-e6ade9ed8455/her_leg_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/relitofamukoduje.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_off0000515d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x515D 5072 bytes
SHA-256: e42aa62e8af58bb5b14b0e015fe3ebb84a3e3de0c1bf246ec4d731b9fdb6d5ed
font_01_sfnt_off000062b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62B2 11340 bytes
SHA-256: c3203abada8d729dcbc0dfb81f797c2705fcc490ccffe59a6b4437db72c64981

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