Malicious PDF — malware analysis report

Static analysis result for SHA-256 477e1c1f47783b57…

MALICIOUS

PDF

47.8 KB Created: 2020-10-03 20:40:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: acd431d35d7688913db8e626d99b4b4e SHA-1: 628f7f153ebee161134667d2b88080e14ee8dd75 SHA-256: 477e1c1f47783b570446e6799370b1a004aced7cc9e50549fc4cf3ec59706cc8
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.ru/pify?keyword=the+boy+in+the+striped+pyjamas+characters+list In PDF document text
    • https://site-1038514.mozfiles.com/files/1038514/datotirawujepu.pdfIn PDF document text
    • http://kavup.specialhandsgroup.com/uploads/1/3/1/4/131453134/8f2216e084c.pdfIn PDF document text
    • http://files.danielzlatkin.com/uploads/1/3/0/9/130969356/56609cfacc95e5f.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/1/0430/2451/5229/files/vagepedixurudinugozarasa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6668/3292/files/2883802162.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9826/6016/files/46563752322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7768/7701/files/56570472539.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/clarinet_mouthpiece_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3741/5831/files/raxagevetojuvipoma.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1062/1341/files/components_of_health_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0096/1947/files/r_error_in_list_filesfile_ignore_missing_true_verbosity.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2892/9945/files/when_does_wingull_evolve_in_pokemon_platinum.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_off00007c39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C39 5580 bytes
SHA-256: a855a7257ebed4d1014b1afaabcc15348cad63452f964e35eb097f3736905844
font_01_sfnt_off00008f0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0B 10284 bytes
SHA-256: 07c436c42647fde0ca8b11223f1985bf4e19eefee6f9c14e4f8eaa13f99684df