Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ade4d3de3999a9…

MALICIOUS

PDF

41.6 KB Created: 2020-10-07 11:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9328ddc49b9b892b9c27400d8f7ac73c SHA-1: ae2bd50ac3d3f8b94cf0d16f5738e92f11a3b16e SHA-256: 85ade4d3de3999a9d7902669c3496efd71d7fd056acbdc38d2cb117211a8f431
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://gettraff.ru/pify?keyword=escape+to+planet+earth In PDF document text
    • http://files.mndefenderwear.com/uploads/1/3/2/6/132681602/6327526e3da309.pdfIn PDF document text
    • http://files.huellasdepaz.org/uploads/1/3/0/9/130969632/muwaxebidatoju.pdfIn PDF document text
    • http://files.painttownred.com/uploads/1/3/1/4/131452935/3092404.pdfIn PDF document text
    • http://mesutijis.ffbdispositions.com/uploads/1/3/1/0/131071037/8c9d668ceb3dafe.pdfIn PDF document text
    • https://site-1043653.mozfiles.com/files/1043653/nonuvi.pdfIn PDF document text
    • https://site-1039514.mozfiles.com/files/1039514/71181343222.pdfIn PDF document text
    • https://site-1040360.mozfiles.com/files/1040360/28646952336.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/1/0437/1808/2711/files/ford_model_18335.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4379/6645/files/social_security_office_albany_ga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/6913/9872/files/ascent_infinite_realm_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0110/1985/files/sun_for_the_vampire_3_walkthrough.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1943/8750/files/nizijazajufexupinawukup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6128/0413/files/68708518280.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7313/2957/files/osha_manual_lifting.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/2480/0673/files/7037569775.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_off0000672f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x672F 4976 bytes
SHA-256: bf9c6f82dcb0d4110d4ebaa6d316ae00b7a1abea99c35a5a61d07bda7904ac1f
font_01_sfnt_off00007818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7818 9908 bytes
SHA-256: 93ac3068b9b61a40b39f207668003a3db0003e27259c636427418381eb5857f7

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