Malicious PDF — malware analysis report

Static analysis result for SHA-256 043e7d2413d58a0a…

MALICIOUS

PDF

44.1 KB Created: 2020-10-03 16:43:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d2691aaa993f31b86e61cf3b1b2e372c SHA-1: 63844beb75fc755a34c648db7713349c49c301d3 SHA-256: 043e7d2413d58a0a0dd10d4fe5cd053fa8aa792b028d867a71cb59149b7a46ba
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, which is further supported by the presence of a PDF link farm. The document body, though partially corrupted, includes the malicious URL and several other URLs, some of which are benign. The primary malicious URL is a redirector designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://ttraff.link/pify?keyword=around+the+world+in+80+days+printable+worksheets In PDF document text
    • https://site-1040125.mozfiles.com/files/1040125/5513192287.pdfIn PDF document text
    • https://site-1036665.mozfiles.com/files/1036665/26602954180.pdfIn PDF document text
    • https://site-1039212.mozfiles.com/files/1039212/rinobamanovedasalubi.pdfIn PDF document text
    • https://site-1038919.mozfiles.com/files/1038919/puzaxegeguzapumeveg.pdfIn PDF document text
    • http://jezipab.whitelandchoirs.com/uploads/1/3/2/3/132302966/3968270.pdfIn PDF document text
    • http://files.alightintheworld.org/uploads/1/3/1/3/131383720/20dee5f0b9bd70.pdfIn PDF document text
    • http://files.topshelfbonsaipots.co.uk/uploads/1/3/1/3/131380848/8483372.pdfIn PDF document text
    • http://faxinom.lifewithhelp.com/uploads/1/3/0/8/130874370/8030598.pdfIn PDF document text
    • http://files.inspire-montessori.com/uploads/1/3/1/4/131452961/213893.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/1/0479/8044/5852/files/restaurants_near_soccer_city_cincinnati.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7314/6532/files/manual_de_teclado_korg_triton_le_en_espaol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/2500/5206/files/lokebakibukesipizarope.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/showtime_rotisserie_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/6664/0534/files/what_is_the_equivalent_resistance_of_two_12_ohm_resistors_connected_in_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39300ed7-4276-4582-8c70-63328b423b5b/venebutapozux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c06d7459-db1c-44f3-a239-7b5fa2ef576c/tikalaxijurus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/caded00b-4f80-495f-9f83-6751f6b3fea6/91201327513.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ab7ea77-9d69-4cbb-84f7-6b32debed265/danegol.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_off00006cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC0 5768 bytes
SHA-256: c8ab6810cb267b17ed80804bc9b61f7d0a98f0e4be9e219deb68478760f17225
font_01_sfnt_off00008072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8072 10148 bytes
SHA-256: b69f277fc42f5f25b93051d4ad101d7fb07c42fdda51968f9127974f1f6a48f6

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