Malicious PDF — malware analysis report

Static analysis result for SHA-256 3320df8d7d336e7f…

MALICIOUS

PDF

34.2 KB Created: 2020-10-08 05:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: e3524a551111a3edc37281f8dfbe5d65 SHA-1: e24c490ee4311727a7c013cfe2ed711a0960d192 SHA-256: 3320df8d7d336e7f698ddfcec68fb6690cf23342653f2fe97e38315a8739edd7
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.com/pify?keyword=spc+aiag+manual+free+download In PDF document text
    • https://site-1043562.mozfiles.com/files/1043562/luxisaxomenidimize.pdfIn PDF document text
    • https://site-1039349.mozfiles.com/files/1039349/49044977197.pdfIn PDF document text
    • https://site-1039547.mozfiles.com/files/1039547/94650000945.pdfIn PDF document text
    • https://site-1036671.mozfiles.com/files/1036671/detuwizuxutopulitabi.pdfIn PDF document text
    • http://files.southerngracedanceco.com/uploads/1/3/1/3/131379268/288838.pdfIn PDF document text
    • http://files.teachmeaboutautism.com/uploads/1/3/0/7/130738751/vuraremetuwik-nivijivelo.pdfIn PDF document text
    • http://files.nwtsciencefocus.ca/uploads/1/3/0/8/130813518/menasujeradof.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/1/0496/6236/1753/files/wgn_radio_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6213/0848/files/jennifer_mcfelia_villegas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/0019/3182/files/telecharger_hp_eprint_windows_10.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/9100/6108/files/nilegute.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/2641/6551/files/bosch_hot_water_heater_parts.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_off000048e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48E5 5492 bytes
SHA-256: 274742825a023f618b4e633d2ed0bb80792c9bb6e7165aab6d7abf99dfc9b240
font_01_sfnt_off00005b8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D 9512 bytes
SHA-256: ae4a0fb3a9819fab7224fd1a4bee367713792a47b058d33fa4aa150e2672524f