Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f2c58e8a3cccf98…

MALICIOUS

PDF

49.5 KB Created: 2020-08-26 05:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3017c0f9372d32ae11eb4fc8047d8005 SHA-1: e9ea240a6b14c1610c2342b8fcdfbf6eaac54a42 SHA-256: 3f2c58e8a3cccf986749d68f207c637ddded8e7dfd9806f407c45f8221362062
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.club/pify?keyword=fluorescein+synthesis+mechanism In PDF document text
    • http://files.bostonhughes.com/uploads/1/3/0/7/130776341/pumupixeviwuvi_tovodinavuxa_vusudowunazix.pdfIn PDF document text
    • http://files.projectrunlove.com/uploads/1/3/0/7/130740078/52d1191d971.pdfIn PDF document text
    • http://lidon.clpsfamily.com/uploads/1/3/0/7/130738615/3279560.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/1/0429/8365/3527/files/sipikozifej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2398/3015/files/kedoxuloporasutajiwuxomaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4647/5678/files/jazawafasodijotugomalaga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5706/1788/files/mituvisikutokufi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6654/files/miwuwujawawopamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7142/2102/files/american_chopper_death.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8151/5673/files/zawozogufagipanuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/6061/7365/files/kanashimi_no_mukou_e_piano_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5041/7827/files/3585736588.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0323/1908/files/76070170126.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9249/9877/files/bootstrap_font_awesome_cheat_sheet.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_off00008002.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8002 5096 bytes
SHA-256: c9c4ccda0a607f1f98e467d3f40d78d10ecdf186a8f60b7bbba43323b9b5aa85
font_01_sfnt_off00009129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9129 11812 bytes
SHA-256: 9e68907cd7500be05e7f40bb05ca460eb673db5f4ee15d8c5dabd1e2b31b794b

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