Malicious PDF — malware analysis report

Static analysis result for SHA-256 985fb59907f18a5e…

MALICIOUS

PDF

50.4 KB Created: 2020-10-26 19:55:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9f2ab9055749b0b27351ca6f7c3ac922 SHA-1: 3c061bdf5385ccb5e8483cc4ca27235b1d34cf1d SHA-256: 985fb59907f18a5ec9f5fe3190ed5ca2de8ecf59c0f3b7c51ef756416c28d31f
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a heuristic firing for linking to known malicious redirector infrastructure, specifically pointing to 'ggtraff.ru'. It also exhibits characteristics of a PDF link farm, embedding a large number of external links, many of which point to benign Shopify domains but likely serve to mask the malicious destination. The document body, though heavily obfuscated, contains the malicious URL, suggesting an attempt to trick users into clicking it.

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://ggtraff.ru/123?keyword=powers+denied+to+congress+section+9 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_5f8d301ecc9de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5f9537a6a399a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5f8978aec0e38.pdfIn PDF document text
    • https://godadonalizubo.weebly.com/uploads/1/3/1/4/131437317/6567886.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/batagebexi.pdfIn PDF document text
    • https://sujibume.weebly.com/uploads/1/3/4/4/134442643/napuwug_xexurugaz_worebet.pdfIn PDF document text
    • https://zulatikuwa.weebly.com/uploads/1/3/0/7/130776211/wepupumalixetipu.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/gilulebomasuzan.pdfIn PDF document text
    • https://kusanogiwaxug.weebly.com/uploads/1/3/0/8/130873987/88c06e8e37f.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/manilumaj.pdfIn PDF document text
    • https://vogizezadu.weebly.com/uploads/1/3/0/8/130814341/pimasenis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8332/8405/files/58060060826.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/81138746464.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7738/1543/files/62068639117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5469/4039/files/51082600128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8227/7570/files/faceapp_pro_apk_cracked_3.3.5.2.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/97146609694.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4073/7957/files/nexex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7556/6752/files/tec_9_airsoft_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9032/2630/files/download_facebook_lite_for_android_version_2.3.5.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_off00008861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8861 5112 bytes
SHA-256: 5cf79f822fe3401e9d3e0b1d60700717fd00582895f37071aa7607289571b182
font_01_sfnt_off000099e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99E2 10112 bytes
SHA-256: 1a31a1929559b42f1e5555e14b6a1971eb3e626f50195c95597d34f0395710ab

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