Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d45c82ac9e5c5b0…

MALICIOUS

PDF

43.8 KB Created: 2020-08-25 21:09:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 85635aabec7b150c2f8a64005403053c SHA-1: b8d0ca94b875da7aa9a008b0a9f9bb55e1f05251 SHA-256: 5d45c82ac9e5c5b0638e0811881f2542015c22c49a6496e9bf0de4ef5c2ff40a
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.club/pify?keyword=Ewe+boon+road+palm+spring In PDF document text
    • http://files.oxfordresearch.org/uploads/1/3/1/0/131070751/06e30dd6288.pdfIn PDF document text
    • http://files.herbalhealthandhealingarts.com/uploads/1/3/0/7/130776042/9519705.pdfIn PDF document text
    • http://fasuz.tollresidentgroup.com/uploads/1/3/0/7/130775162/gemomolamanogo_fegalulej.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/1/0434/1753/4629/files/36109871322.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2156/5078/files/juwamowerajufageleji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2168/1315/files/2069896552.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/gitisizetazogazetig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4391/2854/files/vakebawefunituvufipika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9726/0192/files/mesavun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3998/0710/files/kevisuxonuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/wowaxesavosusunifapanexek.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/18946693843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2619/4336/files/pijubosena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/12239527261.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_off0000637b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x637B 5468 bytes
SHA-256: c9b8bec9c26e5b5e5fb641ef1b8c75d96b0b540a8c01f0600c4ee972153d3a24
font_01_sfnt_off00007605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7605 14176 bytes
SHA-256: 70397945ffc4f4fb16958f1e23b6d499518b3cedeeb235ff09c44662db27d261

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