Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a2e9bbbb68071d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-23 22:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d554f516a1b87f520725ede99f13ffef SHA-1: b2faf3a5af1e324e95ac33220bdc3a25750950c7 SHA-256: 74a2e9bbbb68071d9dd69d11a56e2b47777d42afe48f1227877af80cb86f89dc
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=android+tv+remote+control+sony+bravia In PDF document text
    • http://wazivomo.tinlizziesokc.com/uploads/1/3/1/4/131454106/bdd98d13368.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0465/0536/1566/files/text_scanner_and_fancy_text_pro_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0811/4340/files/xibeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7691/0242/files/70633822610.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/22867201410.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2854/5693/files/skechers_uk_size_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7964/6878/files/73529032217.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1018/6654/files/83116934975.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7972/8281/files/darapaseti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0238/7867/files/28010390103.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8502/8757/files/clarinet_scale_sheets.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000553c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x553C 5164 bytes
SHA-256: 93912caeb3a47a1c2fb36bf7ae0af79e4eb548e615ed3b6869e45727042e653d
font_01_sfnt_off000066ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66AE 10652 bytes
SHA-256: 4f2e5cfe45225eb31cc8bf700096cc358f9974c29c22d57a75dc85d9e99b7510
font_02_sfnt_off00008af9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AF9 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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