Malicious PDF — malware analysis report

Static analysis result for SHA-256 1558e5d5e5832be5…

MALICIOUS

PDF

48.6 KB Created: 2020-07-29 22:42:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c2ea0ee37f146a46d888f89d9fdcb18 SHA-1: 55809be2f7eae6810811c431b4c4ed6db447a870 SHA-256: 1558e5d5e5832be57c090413d5ff50f916b9c9836b7734368c0e9a5e129bf1b4
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=calorie+counter+australia+pdf In PDF document text
    • http://files.aprilmariehale.com/uploads/1/3/1/3/131383325/woxijiki.pdfIn PDF document text
    • http://files.chapel-associates.co.uk/uploads/1/3/2/7/132740498/lariguboxesodefukibe.pdfIn PDF document text
    • http://files.junctioncraft.com/uploads/1/3/1/8/131871687/norasifutisiwaridipa.pdfIn PDF document text
    • http://files.ccumc.us/uploads/1/3/0/9/130969220/faguxuzusafotut.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/1/0440/8174/1976/files/45474335506.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6248/5407/files/567830555.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2247/3624/files/roduvajuzomi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1755/2543/files/fazonoxolowaz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9733/3668/files/tegakedozixumugig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6676/1120/files/12069354000.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1543/0553/files/mazopebonotamev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/femaferimezarezisazol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8991/2218/files/joduliwapujixasob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/70838758317.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3576/9497/files/93731960079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/dijowororarutebij.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_off00008013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8013 5052 bytes
SHA-256: 8ed4d76dae2dcf2f26d83f940b67526563089c408ff93b0361ee9e9c8c9cf958
font_01_sfnt_off0000914d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x914D 10664 bytes
SHA-256: d919217c2e2ca12ada0032f7944855bfc35336ec55442b95b18ed29f79c3af75

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