Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4662b76800839f5…

MALICIOUS

PDF

47.4 KB Created: 2020-10-19 06:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9258eba250bf4ebbfa51b6f7c6e97f19 SHA-1: 2844cdc4fe553c2ce7fe5e9e2bfe4884362a5007 SHA-256: f4662b76800839f5c7f17b0a58749f09f0992ef46f77ba20d9aa39449248a434
154 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with a critical heuristic identifying a link to known malicious redirector infrastructure at 'https://ggtraff.ru/strik?keyword=borderline+personality+disorder+work'. The document body, though heavily obfuscated, also contains this URL and other benign-looking PDF links, suggesting a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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/strik?keyword=borderline+personality+disorder+work In PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/govorikepudago-gixidawele-wawep-xoxebilepadevu.pdfIn PDF document text
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/fagol.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/vegoluruwigepok_fepuxagasovotal_xubezekiwajas.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/13433fe.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/dozafawegikuxoto.pdfIn PDF document text
    • https://wonigebegi.weebly.com/uploads/1/3/1/6/131606731/8039140.pdfIn PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/zezojenada.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/guligorajiwuv-bigixibipasi-xinerajekipo-napixaromivus.pdfIn PDF document text
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/8267638.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/1/0484/7255/5674/files/61679699996.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8045/9438/files/personajes_de_don_quijote_dela_mancha_parte_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/6810/2558/files/morojolujuguzifasowuzer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7877/9047/files/que_es_nutricion_holistica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8813/files/minecraft_video_maker_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f610112d-5661-41da-9da3-6c17bbaa4837/xapedavok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d04a4c6-e840-41ce-ba65-eabe5192776c/julifusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bea76fbf-a2c1-4632-9b9f-d27a55ce6535/recetas_de_jugos_nutribullet_en_espa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1a335ef-35fb-400b-a5c0-130b8a8370db/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0b18902-9b27-4146-a634-68708736d992/kubovixot.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_off000070d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70D3 5260 bytes
SHA-256: 05fea02d3a04fafa5021333414e4fcbeb19d51476ab37dbaaf81cb7700901b44
font_01_sfnt_off000082d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82D8 14256 bytes
SHA-256: 310b68a922e335ede8e2fa05063c16cd057b7b7f06cf2889928b9cfe4c78223a

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