Malicious PDF — malware analysis report

Static analysis result for SHA-256 50dbf90b40d5d7ab…

MALICIOUS

PDF

48.6 KB Created: 2020-10-24 18:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d913a88e3c3c61b1ed8f7785fa179fad SHA-1: 1758f46f0930033d1d4d2431c17b8c214ab77d00 SHA-256: 50dbf90b40d5d7ab1a73eb912266193a64ad2fb96f0c939d826df219072c2b1f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. The document also functions as a link farm, embedding numerous external links, many of which point to benign Shopify URLs but one specifically to a malicious redirector. The primary malicious URL identified is https://cctraff.ru/strik?keyword=ejemplo+de+manual+de+procedimientos+y+funciones, which is likely used to redirect users to 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://cctraff.ru/strik?keyword=ejemplo+de+manual+de+procedimientos+y+funciones In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2404480b5f30.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/tadesix_bipobusav_lototozilud.pdfIn PDF document text
    • https://senobatupubem.weebly.com/uploads/1/3/1/4/131437889/jekogikopiz.pdfIn PDF document text
    • https://wazajodowefode.weebly.com/uploads/1/3/4/0/134017502/wivevuletaxokap.pdfIn PDF document text
    • https://dikoriwapajok.weebly.com/uploads/1/3/4/4/134447187/siwuwebexaragis-loxino-lobugugini.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/1/0498/7781/1358/files/pokemon_fire_red_rom_unblocked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/7914/5374/files/greenville_county_arrest_records_today.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8223/4039/files/metal_travel_guide_dublin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/5873/1429/files/velatidazajuvobononataxif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48849e2-957e-4cad-9e5a-2b9e7d86ecf6/sorovupe.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/80810564405.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/bpsc_question_bank_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/xilasisefi/ielts_academic_writing_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/infringement_of_geographical_indications_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/4156263486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4946/6526/files/business_meme_man.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3325/8915/files/wupawagaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/0887/4423/files/natolevilitop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/3876/1109/files/las_nubes_luis_cernuda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/2098/4735/files/best_priest_macros_classic_wow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5767/5421/files/esc_guidelines_nstemi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7606/1850/files/cara_main_kartu_poker_biar_menang.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2881/5284/files/honeywell_wireless_thermostat_manual_cm727.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/positive_affirmations_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6035/3429/files/73692456325.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_off00007ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA6 5436 bytes
SHA-256: a76fa057ea81c9c9e9127acf410f68c2200c36cd26c2c228e3b4ce09cce63d23
font_01_sfnt_off00008f1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F1D 10884 bytes
SHA-256: f4a09c877c2c7a802c590d3241371b43b75dc9ef059deb45335250cbe898abf6