Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97ea5d871c29cbe…

MALICIOUS

PDF

46.1 KB Created: 2020-10-05 00:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e43f8f5a94b6ef1e45dd417a8669c2cc SHA-1: e2cf78c7a9801d97d5720874940f848acb48e042 SHA-256: c97ea5d871c29cbe466a3469ff500218c521858cb2bcf7ad90e5502d73120929
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=14+1+what+causes+sports+injuries+answers In PDF document text
    • https://site-1036883.mozfiles.com/files/1036883/78883746140.pdfIn PDF document text
    • https://site-1036987.mozfiles.com/files/1036987/gajegivujodinojiseguzon.pdfIn PDF document text
    • https://site-1038967.mozfiles.com/files/1038967/28420832819.pdfIn PDF document text
    • https://site-1038772.mozfiles.com/files/1038772/31085089996.pdfIn PDF document text
    • http://files.shaylerconcretepumping.co.uk/uploads/1/3/2/7/132740620/linotilewivozesidefi.pdfIn PDF document text
    • http://vokag.nibrassborzoi.com/uploads/1/3/0/7/130739393/39c5b5.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/1/0436/4464/9630/files/anime_black_cat_with_blue_eyes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4392/9757/files/kejilosubixuwevime.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4953/3088/files/ben_hill_griffin_stadium_lego.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9972/1379/files/dokkan_battle_dragon_balls.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1038/4295/files/koneveje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/0397/8143/files/escritorio_de_windows.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6858/8185/files/disozozis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9431/8497/files/63692646467.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_off00007877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7877 5200 bytes
SHA-256: 852fd2e6f8f264af0f162fb4cd333c361235bd128f1ac1a7f2f2bb7bea0177b1
font_01_sfnt_off00008a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A3D 9696 bytes
SHA-256: 558975acb5898070122ee4892c84a479d1abecc0c4f6daabbd0c052b42cdfe64

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