Malicious PDF — malware analysis report

Static analysis result for SHA-256 70c43473a267e6e4…

MALICIOUS

PDF

43.7 KB Created: 2020-08-22 06:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 07f2ea8c569157ff8ba6234feba41649 SHA-1: 691d73f87d168546a7057fbdeb9861f4bc2c5d00 SHA-256: 70c43473a267e6e478bfb8bed6a08433f02e265bb2d6711382398f5aac00d2a5
194 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.ru/pify?keyword=collaboration+software+open+source In PDF document text
    • http://files.lotusliondesign.com/uploads/1/3/1/4/131407530/6797100.pdfIn PDF document text
    • http://files.omega-m.si/uploads/1/3/1/0/131070561/patisokad_zuvulafadaduti_kijufu.pdfIn PDF document text
    • http://votuzedim.slytactraining.com/uploads/1/3/1/1/131163635/f3dee56ec.pdfIn PDF document text
    • http://files.bethuneandson.com/uploads/1/3/0/9/130969558/5578023.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/1/0437/2729/0518/files/drug_induced_dementia_a_perfect_crime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2707/0104/files/max_32_bit_integer.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8119/5927/files/nobividewug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5756/9176/files/rakugenotixe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8499/7025/files/leveperobedefunukozimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8913/files/femevepilasedimowuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0415/8364/files/drivers_village_syracuse.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6196/9057/files/ceidg_formularz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1645/4305/files/12353661532.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/nexixejiponepidu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9722/6402/files/tojipupatojize.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2297/4117/files/bisilunazatogure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7997453156.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_off00006c13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C13 5148 bytes
SHA-256: da730325ec9798a4d5f169792cc64bba406c803188cdd0e58ca10b883812f896
font_01_sfnt_off00007db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB2 10592 bytes
SHA-256: 3669dffa297e91948ed41895b3bee8e85b6f0662067b33ba3c4d2dd38c7a1254

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