Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2180b4c8d49bd4a…

MALICIOUS

PDF

40.6 KB Created: 2020-08-05 13:22:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2504566f89d6972925a1d55289f44f49 SHA-1: 6339a44eb93f232d1d4e9f11b5e4ba8fda69d168 SHA-256: d2180b4c8d49bd4af1638b53102abf615d4bfd6480eaf3bbba222552ed6053db
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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=convert+corel+file+to+pdf+online+free In PDF document text
    • http://files.tessasanosnutrition.com/uploads/1/3/1/3/131398498/6cbce165.pdfIn PDF document text
    • http://files.categeard.com/uploads/1/3/1/4/131437873/kuwewesivevesef-belimogapulej.pdfIn PDF document text
    • http://redevozov.kauffmanskeep.com/uploads/1/3/0/7/130776257/7840942.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/1/0428/0962/2687/files/lisosumopunusinekiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2451/5229/files/totebiturodejudet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7901/5327/files/saxon_algebra_1_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1767/4656/files/biography_of_abraham_lincoln_in_english.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sakumuxapiwitisozu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8334/1728/files/18854051961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4439/7468/files/fekivifixub.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7750/0056/files/bobusududilefubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/risokiwawetijiliwumobusox.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/pilalidinumuvonowewes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8570/8953/files/xatun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/53794604838.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6202/5624/files/84431298987.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1311/1961/files/24771063960.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_off00005db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB6 4728 bytes
SHA-256: 84a3edd04f807a552a377a7aaa065512a4504b84eb408d063efe01a5509d83a3
font_01_sfnt_off00006de4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE4 13980 bytes
SHA-256: f739e0ea3dc289b91503ebad44d9f07e74927b3d770b2e8d200967a8ec1f8461

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