Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f3c31c40657e3f…

MALICIOUS

PDF

46.7 KB Created: 2020-10-27 18:24:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 86e048363ba9398cee7bab693c2f080e SHA-1: 9c3118701c6006e5b55d0e54c6429b99fc051bed SHA-256: f7f3c31c40657e3feea79a2b08ef3d6c92ff4aa7cc580f8fc18744c96a4be22d
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The heuristic firings indicate a deliberate attempt to create a link farm, likely to distribute malware or engage in SEO manipulation. The document body, though heavily obfuscated, contains URLs that are also present in the list of embedded links.

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.com/123?keyword=maus+2+chapter+2+quotes In PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/dukagabesixarug.pdfIn PDF document text
    • https://raxiruzaxulam.weebly.com/uploads/1/3/0/7/130738564/9514745.pdfIn PDF document text
    • https://tonurokekar.weebly.com/uploads/1/3/4/4/134456200/4329140.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/a645ec4cbbda5b.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/be2eff44-e9d6-4d27-927a-cb2acd1873b8/37718562760.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c008015-4a21-4da3-b275-61b8bcf4d5a0/lafovapimezegabusefe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8361/9232/files/general_anaesthetic_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/1285/8278/files/terra_nova_practice_test_7th_grade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4206/0460/files/introduction_video_maker_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/80047023426.pdfIn PDF document text
    • https://s3.amazonaws.com/golepe/bern_switzerland_map.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/59182837863.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/81029566056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/0301/8918/files/boska_komedia_dantego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8214/6479/files/nisazosenixakipozagelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/0284/2264/files/fort_benning_library_phone_number.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6093/1991/files/the_selection_kiera_cass.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7787/0786/files/57863520910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b4ab5e-1be3-448f-ae5a-2892e6192600/palme_biyoloji_konu_anlatC4B1mlC4B1_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79820b98-6505-4b2f-9423-5de16070439e/86735887644.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8c2501-1a5b-4b84-af32-38ec8cc879da/nodepozutotisekuwikop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14382cc3-5247-4d42-8498-9c0c0d0f9c76/brayflox_s_longstop_guide.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_off00007938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7938 5252 bytes
SHA-256: 1b652e4a720eee9dd94b1d105fcce4b1b1efd45ff714bd6942f7d3f40a9289ab
font_01_sfnt_off00008b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B19 10240 bytes
SHA-256: be7aeacfa062dda0230764d113e6cc84a6acf48ba82147bbe4fa1e9706d8b961

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