Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff7830e6a1b25622…

MALICIOUS

PDF

40.8 KB Created: 2020-08-06 17:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b8e5d060381e121b76bbbb4aff87bbd7 SHA-1: 62385058efabd72824d1fee53cf12b1c9d3c083e SHA-256: ff7830e6a1b2562237636bc3e26f0cfa92491c2390a84825c04b54d273b962a8
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=how+to+open+canara+bank+statement+pdf+password In PDF document text
    • http://files.neudorfceramics.com/uploads/1/3/1/1/131164136/6741581.pdfIn PDF document text
    • http://files.themanhoodtree.com/uploads/1/3/0/7/130776500/pabowuw.pdfIn PDF document text
    • http://files.jowtigers.org/uploads/1/3/1/6/131606271/7689be.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9753/9231/files/86243786404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8436/5468/files/dokezibatomavaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/5561128363.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0776/9750/files/rajigob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1678/8900/files/5194328709.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/1151/0170/files/cartoon_war_games.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5018/9478/files/62953805237.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0571/4338/files/38449996071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/9800242408.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5219/6249/files/63923498703.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_off000053b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x53B4 5268 bytes
SHA-256: 4826c12dbcaaf90c7ecaeea251f22da756b05a6d1fc3f34db77f4d0dc1467920
font_01_sfnt_off0000657f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x657F 10144 bytes
SHA-256: 65a5054b4b3b662928f94005b2cb18a67329b3314e8cc80edf081ad090385777
font_02_sfnt_off0000882d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x882D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e