Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7f0d9c3ec9a586…

MALICIOUS

PDF

47.4 KB Created: 2020-08-11 01:22:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bc398f84ae0497f4330cd29e83d8d4e3 SHA-1: b4e25d7c14184e2cad1254f28bb7ad48d149c24a SHA-256: 1b7f0d9c3ec9a586fc5e898f2c9e4f5600d20c331c79d9574cfbda697308abc0
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.cc/pify?keyword=adjacent+vertical+complementary+and+supplementary+angles+pdf In PDF document text
    • http://files.mrstuckeysclass.com/uploads/1/3/0/7/130776841/4143467.pdfIn PDF document text
    • http://files.waltersegal.org/uploads/1/3/0/9/130969169/d57676.pdfIn PDF document text
    • http://files.lotusbud.co.uk/uploads/1/3/1/4/131454190/c698d8cfbd9a.pdfIn PDF document text
    • http://kilebe.murraysfoolsdistilling.com/uploads/1/3/1/8/131871699/faraka.pdfIn PDF document text
    • http://files.swannanoavet.com/uploads/1/3/1/4/131406841/5271842.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/1/0436/4101/2382/files/59351323453.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/email_writing_tips_examples.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7791/9129/files/lagebedusajujuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1342/2753/files/44437355509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5537/3720/files/xevubixuwuraja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8814/2743/files/peduva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2358/0830/files/gatixenomeniwogakoxudok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4191/5042/files/ni_file_bng_nitro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6191/1458/files/77017490294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3267/files/nopirubovi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1717/3149/files/anatomie_appareil_gnital_fminin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0574/7095/files/minion_song_banana.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5511/9512/files/33086611511.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006006.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6006 5700 bytes
SHA-256: 8d11ba1d158ec50a6398e2fe9dcf6f560937c712d16ab1b9dcc99744e08f91ef
font_01_sfnt_off00007367.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7367 12584 bytes
SHA-256: c771ed81ad99b47972db471b8c73494f81688e0912e9fc50eeb2f9c885069801
font_02_sfnt_off00009b2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B2D 16072 bytes
SHA-256: f3b752e25d2e3098dc5b351a512c5ca672d2b137fcb7ddb3f81b2384be51d5c3

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