Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecae716683ea746c…

MALICIOUS

PDF

43.8 KB Created: 2020-07-10 04:43:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 257a7202191f7cf89f28f1af03d090dd SHA-1: 85e0246d25b65c795e8ce9e2119cd5a7b3e0a0c1 SHA-256: ecae716683ea746c64889e62c7730e5e032089bfc534c98163e6fd23f6b67e62
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, many of which point to domains associated with SEO poisoning or link farms. The primary link, 'https://ttraff.com/wb?keyword=buscopan%20bula%20gotas%20pdf', is identified as a malicious redirector. The document body, though partially corrupted, also contains this URL and other PDF links, reinforcing the attack pattern of luring users to potentially malicious external sites. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wb?keyword=buscopan%20bula%20gotas%20pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • http://files.haas-jordan.com/uploads/1/3/1/8/131871850/kumulapezif-fatorewagowav-rojep.pdf
    • http://files.whhstdc.com/uploads/1/3/1/0/131070771/togure_vuvazusobik_selimaxakuxib_delitik.pdf
    • http://files.wicknsudsbydino.com/uploads/1/3/1/4/131453299/suvij-sivogibisa.pdf
    • http://files.annabarnhart.com/uploads/1/3/0/7/130775368/ea88437c.pdf
    • http://files.linhr.com/uploads/1/3/1/0/131070189/tabotusatoboza.pdf
    • http://files.rebeccaevansam.com/uploads/1/3/0/7/130739571/d3785d48.pdf
    • http://files.sandypawsanimalrescue.com/uploads/1/3/0/9/130969300/f16c63808b960b6.pdf
    • http://files.mselias.com/uploads/1/3/0/7/130775520/pakutaxabib.pdf
    • https://fugezatevuda.files.wordpress.com/2020/07/torudugun.pdf
    • https://dabodurubavo.files.wordpress.com/2020/07/67433995764.pdf
    • https://sutuzor.files.wordpress.com/2020/06/dejopudogapenokusavafuta.pdf
    • https://vuvijegasu.files.wordpress.com/2020/06/rirekexoneloxaravoras.pdf
    • https://bununur.files.wordpress.com/2020/06/5773494568.pdf
    • https://xipewatataz458399044.files.wordpress.com/2020/06/69074772248.pdf
    • https://xazudazeliz.files.wordpress.com/2020/07/nakujeruxunu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/61086590007.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/suton.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90841244024.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vizinedidobirefeguj.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nimapudusakodinufuzexive.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b88.bin
a42d370b65de1a58774e80452e8396a3c0976ee291718e912d222227507addee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B88 5132 bytes
font_01_sfnt_off00007d03.bin
a5b40765cf3b6e8ffd62e43126ceeacee321917973728455ee3069093d8ee977		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D03 10944 bytes

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