Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fd19b1a76e99989…

MALICIOUS

PDF

44.9 KB Created: 2020-10-25 18:04:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6bd7cf51490be0dcd78d8c6e60fb1ac8 SHA-1: 970600a80a2afb95800744dc33d8ecacc26f8150 SHA-256: 9fd19b1a76e99989b7d1c147e7476b15fb66dad62c030b1f20e0d30c519e0431
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that suggest a lure related to 'streaming video camera android', likely to drive traffic to malicious or phishing sites.

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://cctraff.ru/123?keyword=streaming+video+camera+android
    • https://cdn-cms.f-static.net/uploads/4372355/normal_5f893d7e44cc6.pdf
    • https://cdn-cms.f-static.net/uploads/4369654/normal_5f8fb64a4b708.pdf
    • https://cdn-cms.f-static.net/uploads/4415526/normal_5f953da3603f9.pdf
    • https://cdn-cms.f-static.net/uploads/4384644/normal_5f95112269bd1.pdf
    • https://cdn-cms.f-static.net/uploads/4373999/normal_5f8a17f084a91.pdf
    • https://cdn-cms.f-static.net/uploads/4366959/normal_5f87622d35a96.pdf
    • https://cdn-cms.f-static.net/uploads/4366346/normal_5f88ab3a86e55.pdf
    • https://cdn-cms.f-static.net/uploads/4384639/normal_5f91eef1bb172.pdf
    • https://cdn-cms.f-static.net/uploads/4387433/normal_5f9258ad15469.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7ed2d49c-5394-4075-b6df-5df71e5755ba/xumelopomibifefutu.pdf
    • https://uploads.strikinglycdn.com/files/465d84e9-a41e-441a-a8b1-c132e1ce9e2e/jusakub.pdf
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/4524145896.pdf
    • https://cdn.shopify.com/s/files/1/0268/7673/9782/files/4893221692.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6228/files/sepuxigigekedejotudeb.pdf
    • https://s3.amazonaws.com/mukutud/wordly_wise_book_5_lesson_11.pdf
    • https://s3.amazonaws.com/kudowo/tovekuxasokegulorup.pdf
    • https://s3.amazonaws.com/dazifozixawus/lines_written_above_tintern_abbey.pdf
    • https://s3.amazonaws.com/fasanag/4926859265.pdf
    • https://s3.amazonaws.com/tadovu/investigacion_cuantitativa_en_psicologia_clark_carter.pdf
    • https://s3.amazonaws.com/punagilelabon/hematology_exam_questions_and_answers.pdf
    • https://s3.amazonaws.com/minaxigevani/borderline_personality_disorder_demystified_download.pdf
    • https://s3.amazonaws.com/fakuguvil/acordes_de_guitarra_canciones_cristianas.pdf
    • https://s3.amazonaws.com/zewimu/nosopezonakuwegolifekuxaz.pdf
    • https://s3.amazonaws.com/jeworurowam/balance_of_payments_notes.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000705f.bin
ad23ffe79de9ccd1cb1f8fb6cd4e915707c07648e646d7166f634869a8d1c1c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x705F 5212 bytes
font_01_sfnt_off000081fa.bin
63e92a72e0aca9da9eeea730ab287f29f595e864d254d0f8326022990722b4bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81FA 10584 bytes

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