Malicious PDF — malware analysis report

Static analysis result for SHA-256 be9fcc4124c46c32…

MALICIOUS

PDF

41.0 KB Created: 2020-07-10 05:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: c886a528f6ce84374d373448751bd3d1 SHA-1: 5c4e13965df290f35557b20d5d4a1ce9df4f6b1c SHA-256: be9fcc4124c46c32a5dbadde1211cbcb8419905a055d8470741cda178c5bf52c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier strongly flagged this PDF as malicious. The document body, though partially obfuscated, contains text related to a '2019 toyota corolla xse manual' and includes the malicious URL, suggesting a lure to trick users into clicking on potentially harmful links.

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/wb?keyword=2019%20toyota%20corolla%20xse%20manual In PDF document text
    • http://files.calumandkimstuart.com/uploads/1/3/0/7/130775372/6276696.pdfIn PDF document text
    • http://files.eduardoalvesevents.com/uploads/1/3/1/4/131406369/1546902.pdfIn PDF document text
    • http://files.puremotion-pt.com/uploads/1/3/1/8/131871850/ruwavixipolires_dakibedumap.pdfIn PDF document text
    • http://files.mobilecitynz.net/uploads/1/3/1/1/131164419/raxuwipule.pdfIn PDF document text
    • http://files.tuscanrenaissanceacademy.com/uploads/1/3/0/8/130873830/ruzadabubizaluwof.pdfIn PDF document text
    • http://files.aatuners.com/uploads/1/3/2/6/132681356/8213065.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lugewatofub.files.wordpress.com/2020/07/18817748986.pdfIn PDF document text
    • https://lifekatido.files.wordpress.com/2020/06/mutiludunabumawazadowof.pdfIn PDF document text
    • https://bavorekivaso.files.wordpress.com/2020/06/4259045349.pdfIn PDF document text
    • https://fipabimedimi.files.wordpress.com/2020/06/lipilup.pdfIn PDF document text
    • https://mevapojoro.files.wordpress.com/2020/07/76200938502.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/1/0433/0687/7080/files/lofolevunukexus.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwotowomezi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fexofedome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/faramerujinusopuko.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006233.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6233 5336 bytes
SHA-256: 2833789aeb0dd7dd68a6669195331be6d4325348ef421b82091bfd2c4012885c
font_01_sfnt_off00007441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7441 10240 bytes
SHA-256: 7e26d0d7706bf0dfeb3b742cb91b15ad37774b3cb8e37c23d1759a6955976d72

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