Malicious PDF — malware analysis report

Static analysis result for SHA-256 025e8f4f34c5a6d8…

MALICIOUS

PDF

55.7 KB Created: 2020-08-23 16:49:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 42af687e81eef94d8fa7ecb95c34971a SHA-1: 3625be7adaa6f15bc2c1931cf16a3a66cd578beb SHA-256: 025e8f4f34c5a6d83e0c3359fe19b2661425005bca29b4dd9a1f50e531fd4e09
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=badland+winch+3500+manual In PDF document text
    • http://files.aradhanaschoolofdancing.com/uploads/1/3/0/7/130739463/xolaperi.pdfIn PDF document text
    • http://files.lumbercityfarmday.org/uploads/1/3/0/9/130969389/9741664.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/1/0430/7140/6234/files/mewezuwimel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/avadh_news_amreli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9999/6839/files/big_iron_gungeon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7140/6234/files/59520393891.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/2449/0136/files/chew-_wga_v0._9.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2246/6727/files/3401347822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/skyrim_skript_dragon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3000/3358/files/gimiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/35025375484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5733/9816/files/xefosuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2730/8454/files/jokanavo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1818/2041/files/bohemian_rhapsody_fingerstyle_tabs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zevuwuvufotolotatagonisex.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_off00009081.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9081 5052 bytes
SHA-256: d880da2d43bea8259bcb81f23a7a68a26ce4db237bd4a63eae20d18149ceb5e2
font_01_sfnt_off0000a17e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA17E 10120 bytes
SHA-256: 1876baca4292c53257dabca6f06799a6dc003f84e16e8bbc56f0c0aa71ed953b
font_02_sfnt_off0000c40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC40E 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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