Malicious PDF — malware analysis report

Static analysis result for SHA-256 1627123f9d114c89…

MALICIOUS

PDF

62.7 KB Created: 2020-10-02 22:25:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 31fbcb907df0948c11994bc838208f16 SHA-1: 40c9962e793173c623c4818397380eb560fc8acc SHA-256: 1627123f9d114c89d27a5e575d83e022d4f97c66f28a638d28c06ec49c642006
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.me/pify?keyword=japanese+traditional+clothing In PDF document text
    • http://paxapaz.maternalinsights.com/uploads/1/3/0/7/130738666/502897.pdfIn PDF document text
    • http://poziwin.noboundariesdm.com/uploads/1/3/0/7/130740199/tabulipufedubajovusu.pdfIn PDF document text
    • http://files.visalawint.com/uploads/1/3/1/6/131606815/pijopilamitafozivibo.pdfIn PDF document text
    • http://jujidop.tenderheartsppd.com/uploads/1/3/1/4/131452976/tuzasobudel.pdfIn PDF document text
    • http://files.sarahflint.net/uploads/1/3/0/7/130738917/9993279.pdfIn PDF document text
    • http://files.cbdisegno.net/uploads/1/3/1/0/131070912/dimefopoxe.pdfIn PDF document text
    • http://files.kcfearfarm.com/uploads/1/3/1/3/131378953/6132691.pdfIn PDF document text
    • http://vazopomuv.umlf.com/uploads/1/3/2/7/132710621/vulapojile.pdfIn PDF document text
    • http://files.kyoshiki.shop/uploads/1/3/0/7/130739916/2758501.pdfIn PDF document text
    • http://files.klamathmosquito.org/uploads/1/3/1/4/131453536/2792825.pdfIn PDF document text
    • http://digize.moonlyonarts.com/uploads/1/3/1/4/131453915/5c542d65937f0ff.pdfIn PDF document text
    • http://files.mysonnyrae.com/uploads/1/3/1/6/131636927/9009541.pdfIn PDF document text
    • http://files.downforacure.org/uploads/1/3/0/8/130814682/5757789.pdfIn PDF document text
    • http://files.watertheessential.com/uploads/1/3/0/7/130776275/152713b37fe4.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/1/0436/4189/7113/files/kejiluserifanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/7997/0215/files/diagrama_de_flujo_online.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3519/6582/files/bionix_animated_wallpaper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4021/0072/files/pofazufavurum.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_off00009d50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9D50 8292 bytes
SHA-256: 7f624165cd146a725f2d5f1fe5b5a2a9170f8d988b403fa4d6e3cb65a1032067
font_01_sfnt_off0000b8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8F5 5324 bytes
SHA-256: 79ccbc744857a2c5c3f99708a12a076f28e18966c1feae4e35b413057e3c007d
font_02_sfnt_off0000cb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB04 9948 bytes
SHA-256: 1951a002c3feefc8d8f9251faf9463831374cd9e772555bbfd323c115a105fbc