Malicious PDF — malware analysis report

Static analysis result for SHA-256 834c14bcd6220d09…

MALICIOUS

PDF

39.7 KB Created: 2020-08-18 18:17:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 10d1efff7333d5b78ed1b386e615f371 SHA-1: 3876c927bb7082115ff10bf37df4b2b11731c03e SHA-256: 834c14bcd6220d095e4dac6b624314b8dd15d8a57ec75da3d04bc77685dcd87a
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.cc/pify?keyword=chitralahari+telugu+movie+songs+free In PDF document text
    • http://files.littlegiantsbands.org/uploads/1/3/1/3/131398555/172a27b63a16.pdfIn PDF document text
    • http://files.childrenscauseoc.org/uploads/1/3/1/4/131408970/bd4224e9.pdfIn PDF document text
    • http://gunaduti.umcreationcaresummit.org/uploads/1/3/1/6/131606490/lokunigaxonade.pdfIn PDF document text
    • http://files.riseabovepartners.com/uploads/1/3/0/8/130813616/vuwapefo.pdfIn PDF document text
    • http://files.livingstoncoa.org/uploads/1/3/0/7/130740124/gubikitulomezuxu.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/1/0433/4184/0534/files/wawokugezeradirevenizafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/9320/5916/files/wobekamemasunexuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8956/7650/files/95412896128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4425/7442/files/mobefusaju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1265/1170/files/astm_biodiesel_standards.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/68693495581.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7931/1268/files/36129912796.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9811/6006/files/vuzopozubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9785/0017/files/45112223076.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/nazakuvutotanivod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9850/5369/files/4721300467.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_off00005124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5124 5148 bytes
SHA-256: 3f3724a38522ae38409be78125ea2456b0093ecefae62abfc025da201d5d7533
font_01_sfnt_off0000628d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 14776 bytes
SHA-256: 1297097e0dd4aabf78b8fe7476a8a48cc13a6ffe78f1ca371fe35a7d310c620b

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