Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac79a149b1fdb317…

MALICIOUS

PDF

41.4 KB Created: 2020-10-02 06:50:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 11baf52605e880ba990ee27f48a77a21 SHA-1: 7712a5f49bc298318243289eb466c3cee28b8cb1 SHA-256: ac79a149b1fdb317ec6c8b70cbbbb278651f607a276a323ec17a4bd01f223df6
134 Risk Score

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.
  • 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://ggtraff.ru/pify?keyword=anime+living+room In PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/57355722965.pdfIn PDF document text
    • https://site-1038892.mozfiles.com/files/1038892/mebetilaku.pdfIn PDF document text
    • https://site-1039386.mozfiles.com/files/1039386/nudejowu.pdfIn PDF document text
    • https://site-1039869.mozfiles.com/files/1039869/tuxovowimamuvupipezot.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/1/0438/3090/2946/files/sirexitanokipogivosutixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6203/7153/files/94183257785.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5603/2665/files/fasusen.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/9258/5885/files/lg_side_by_side_fridge_freezer_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/8046/1717/files/lands_of_mystery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/advanced_python_for_biologists.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6979/6263/files/coast_guard_regional_exam_center_portland_oregon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6232fc8-965a-4a4a-8e7e-75629dc27e08/nepefibeguronidojefina.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71c39c6b-1e65-4cb3-92e9-7e565ec2efa0/81909986998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f11de7-2238-4e68-9925-503bf454696f/97931161161.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ea9c14a-1a47-499b-8022-6eed52f76eaf/82701299286.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8348a5e5-fa9f-476d-8a6b-483f9c41f1fe/jitabezurinulegararakibud.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_off00006755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6755 4664 bytes
SHA-256: 86294ea8de7a065250c7437ffb60c69661feb1c7923e78bf92d5dab670c2a665
font_01_sfnt_off00007727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 9896 bytes
SHA-256: 1cfb79fb1b0a84d9f6d2b44508db0778fb00d68efe07b4fb70d51b1f98cd9a84