Malicious PDF — malware analysis report

Static analysis result for SHA-256 8031af970124d90f…

MALICIOUS

PDF

43.0 KB Created: 2020-08-08 23:26:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: b736ae66c574d247a798cce853d1317e SHA-1: 7efb8c9e3b26a8a31f3fd368a146a6da08558f08 SHA-256: 8031af970124d90fa0ea6fc7e76a8248ad52289e7eb32289b418917e74100122
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=abbyy+pdf+transformer+full+download In PDF document text
    • http://wezovevez.soccerplayingmomct.com/uploads/1/3/1/6/131606227/nokuwijisemixi.pdfIn PDF document text
    • http://files.nordbywoodcraft.com/uploads/1/3/1/8/131871992/97c51d49cc16.pdfIn PDF document text
    • http://files.stceciliacare.com/uploads/1/3/0/8/130814279/mamafijotepezo.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/1/0433/0687/7080/files/niborenegukudokeregus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3113/2322/files/tales_of_maj_eyal_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/jirupaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/20501609098.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/37741658126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5278/5055/files/gogaziganivipuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8683/0998/files/zuzefekigiritaxuke.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9937/3214/files/atlas_de_carreteras_mexico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8740/4968/files/kogubevumifidodig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7235/6514/files/mulopamenate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/21601765893.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3970/9589/files/wavudefo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8072/1311/files/gegexodolanizu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2172/8933/files/48801004317.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

Related samples 2

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000678f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x678F 5508 bytes
SHA-256: 88a30eb598b22bf2a8e7d7333b6330b340e8cababe2e3f9e490ac093f803dd7b
font_01_sfnt_off00007a45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A45 10704 bytes
SHA-256: 99a142fd63eb95d19566be908a993b72ea83d4059ae1ba799d48f4b2fcfcf5a0

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