Malicious PDF — malware analysis report

Static analysis result for SHA-256 6562a4143e6ef0f3…

MALICIOUS

PDF

48.8 KB Created: 2020-10-22 01:01:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: d3a116d51e8be2201176bd06dc8677ec SHA-1: c5618d220810340143753b78c179d2d55e272246 SHA-256: 6562a4143e6ef0f30f3e37403fbf99344752c75ea8a9bb53cff8f35d5773232f
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.link/pify?keyword=income+guidelines+for+food+stamps+in+arizona In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369499/normal_5f8d30bca0b9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f8ed26d697ee.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/lidimarepuduxanuzew.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/10230185933.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/akbar_birbal_ki_kahani_in_hindi_download.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/school_english_vocabulary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37a429ec-965c-437c-988f-779067ae88f5/helium_exit_bag_success_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/257e0c6b-35ff-459e-8aa2-64e9d6b5d7c3/xigekibagavoduka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/396eed3c-0d86-49bc-a1ce-9e41fdc1df46/rowomalorunuduwagizagabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/933d456c-1898-425d-93ec-d56d6fd6fca6/dibubekubepivukoxefosag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39cc5641-d265-4e15-a5a4-e3a8c017d833/nezafuxomigulobowupi.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/48337102767.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/wadasudalijemorizon.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/62693451752.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/gorukunegufavenexidumed.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/69172796703.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/fapinelaxevurubugefudoke.pdfIn PDF document text
    • https://s3.amazonaws.com/mibiwivanetuj/assurance_wireless_application_california.pdfIn PDF document text
    • https://s3.amazonaws.com/mijedusovineti/dobefekufeligena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8440/7199/files/83609929505.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0457/6618/1028/files/xobadipivivi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5738/1027/files/nezuduwukorofukubejar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1791/6575/files/best_night_light_app_for_android.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_off00007ec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EC2 5460 bytes
SHA-256: 1b19e78ce6ee2771c5466e6eaa86a58f55b5ac7e2d37e570283fae0bd9434b6e
font_01_sfnt_off00009138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9138 10716 bytes
SHA-256: cefe6045533c5e161744d0940bc1cf275f13aced08f403fc88059009afeb33a8