Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e333548f3a92e24…

MALICIOUS

PDF

54.5 KB Created: 2020-08-19 15:28:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d3ef6e7ebdb46a8cc7d2c67a42459b67 SHA-1: bb1bf7438813c5443a7e7e8bcac840da073f9e72 SHA-256: 2e333548f3a92e246ac5358a34ada73a34e070e23599a370efc2d817912f7816
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=marathi+online+books+pdf In PDF document text
    • http://files.paintmypottery.net/uploads/1/3/0/9/130969728/sozedotozomekeroze.pdfIn PDF document text
    • http://wikez.elcaminosband.com/uploads/1/3/0/8/130874038/kolipe-wotibosaja-bibufitax-gexej.pdfIn PDF document text
    • http://files.myjazztrumpet.com/uploads/1/3/2/6/132695932/9487170.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/1/0431/4267/6636/files/40598524798.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/chocolate_sheet_cake_with_cherry_pie_filling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1334/0316/files/anemia_en_el_embarazo_minsa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/7149/9416/files/91596581866.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4349/5841/files/8457121662.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/falolefazaxapokekozopu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6309/1112/files/midagesaxowo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1630/6344/files/landscape_architecture_business_plan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7497/7945/files/wilasexumizagukegegisugoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9649/7573/files/zisakilinujozegofedorimox.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_off00008a94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A94 5128 bytes
SHA-256: ee30299639e66c841f7e0dd2bf1e4f6598e7b4612f8a2efec8f6fb594684d27f
font_01_sfnt_off00009bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BEC 10384 bytes
SHA-256: 7b14e50e2393de98abf39f14b5908aec086e99b0534c24146f13ec8ebc920b53
font_02_sfnt_off0000bf7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF7D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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