Malicious PDF — malware analysis report

Static analysis result for SHA-256 92afe34182631d7f…

MALICIOUS

PDF

42.9 KB Created: 2020-10-08 08:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: fcfe5bf58ec82ce64ec5d3390a5cd998 SHA-1: 5baf188d5bf2ec0bec4b4ad612a2f985f609d60a SHA-256: 92afe34182631d7f4307adc26a032b497f25ed4dc001aa8a8daafcc77e77b5b0
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=orville+redenbacher+popcorn+oil+directions In PDF document text
    • http://files.neuquavalleyorchesis.com/uploads/1/3/1/4/131453193/dudamarepozijire.pdfIn PDF document text
    • http://files.uncagedventures.com/uploads/1/3/2/3/132303147/vamolujiwodisimiw.pdfIn PDF document text
    • http://fiwitibok.shindigpublishing.com/uploads/1/3/0/7/130775388/1906585.pdfIn PDF document text
    • http://pumom.thesetterfamily.com/uploads/1/3/1/3/131398097/2a23418ed1.pdfIn PDF document text
    • https://site-1048273.mozfiles.com/files/1048273/lopovowaz.pdfIn PDF document text
    • https://site-1041600.mozfiles.com/files/1041600/biragi.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/1/0438/2274/3712/files/92955553515.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0465/9413/0085/files/71374585788.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8920/2851/files/charles_eastlake_artist.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2155/6122/files/hillsong_conference_2015_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0659/1127/files/traffic_and_conversion_summit_2019_notes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3764/6245/files/mummies_in_the_morning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5881/3333/files/big_the_cat_fishing.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_off00006092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6092 5388 bytes
SHA-256: a21d10b6fb94a1fae4fa65a50561d883b19abfc056608e7c4550b214c2873228
font_01_sfnt_off000072ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CE 1800 bytes
SHA-256: daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
font_02_sfnt_off00007b5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B5C 10164 bytes
SHA-256: 8780c45141703015414692ac946573842c61914a82c4d7f8dc4c3cd2b8a05514