Malicious PDF — malware analysis report

Static analysis result for SHA-256 9addcc2444fb6a4d…

MALICIOUS

PDF

44.8 KB Created: 2020-10-31 20:12:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: eb490f9b4b146fffa2b74ee27193bc10 SHA-1: ddb3a3ea9e84a6b78325477a003a7d40bd894c95 SHA-256: 9addcc2444fb6a4d29c6e98397dd88ad7ace85e921da1bcbecfa8e84fa96689a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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://gettraff.ru/aws?keyword=homemade+shoe+cleaner+with+baking+soda In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366008/normal_5f8e2fb575661.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://s3.amazonaws.com/jiguwuzobozobaz/common_core_math_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/50706821174.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1290/6405/files/plot_of_hamlet.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/1436491607.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/descriptive_words_and_phrases.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/nafipofobipasorixolof.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5094/3142/files/trigonometric_ratios_word_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/taguredebarizuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8879/6575/files/2020_chrysler_sebring_convertible_top_manual_operation.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8079/4780/files/furniture_row_spokane.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6112/4008/files/keylogger_for_android_cell_phone.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8649/8980/files/wolevafusigiteterazot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9018/8717/files/android_fragment_illegalstateexception_onsaveinstancestate.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/17246952489.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_off00006497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6497 5400 bytes
SHA-256: 7c2bee3a7f78d49de7bc83a8d4420590be91977d6b53c7a26f04af85d9860ca5
font_01_sfnt_off000076d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76D7 9732 bytes
SHA-256: 90a915cfa3a6da1198361adf5abb9346815e23a0cec7213cc8b9b20a80e5c76f
font_02_sfnt_off00009822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9822 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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