Malicious PDF — malware analysis report

Static analysis result for SHA-256 346f4877b324ac79…

MALICIOUS

PDF

54.7 KB Created: 2020-10-26 20:43:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 325d9d90217af1fb529beb5e9145a9b2 SHA-1: 44165ae79a2dd858d8cd2c1c416115460985216f SHA-256: 346f4877b324ac79d012b6777e2b02baf2dc966051526d83ed9aec2e67c9a0b5
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ggtraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, with one notable example being 's3.amazonaws.com/subud/calcium_in_pregnancy.pdf'. The ML classifier also strongly flagged this PDF as malicious. The embedded URL in the document body, 'https://ggtraff.ru/strik?keyword=ed+the+hyena+meme', is the primary indicator of malicious intent, likely serving as a lure for phishing or to download further malicious content.

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=ed+the+hyena+meme In PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/4867245.pdfIn PDF document text
    • https://zirufifun.weebly.com/uploads/1/3/0/8/130874679/7670374.pdfIn PDF document text
    • https://kubupukadumu.weebly.com/uploads/1/3/1/3/131382740/7f8694e061bfd50.pdfIn PDF document text
    • https://nitetezelimon.weebly.com/uploads/1/3/1/4/131438651/papozamijul.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/subud/calcium_in_pregnancy.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/diagnostico_diferencial_hernia_inguinal.pdfIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/prescott_and_dunn_s_industrial_microbiology_download.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/ctet_question_paper_2019_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/duwafijodazepepi.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/neet_mds_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/bed_psychology_books_in_telugu_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/23049844588.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/accelerometer_sensor_working_principle.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/kasoxizexinunuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5234/1692/files/probabilidade_um_curso_introdutrio_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/2906/1542/files/maximum_ride_forever.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/the_abundance_book_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/2349371315.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/the_absorbent_mind.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/article_35a.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/11211268755.pdfIn PDF document text
    • https://s3.amazonaws.com/jeromopelurab/lanukilo.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/sazijojuxegukivesotam.pdfIn PDF document text
    • https://s3.amazonaws.com/turip/disney_california_adventure_map_2019.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_off00009790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9790 4816 bytes
SHA-256: a97f48d95997e71c35a9dba9ad8ed9a41beea6ac76f375bbde98cb33b8f4e8f4
font_01_sfnt_off0000a7cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA7CF 11132 bytes
SHA-256: 9c3fc295a77e0a0604397221745d842e44f1dd6466bc1d8decbf276f2a3a7473

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