Malicious PDF — malware analysis report

Static analysis result for SHA-256 96d719c3093aca3b…

MALICIOUS

PDF

45.4 KB Created: 2020-10-20 11:30:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 418c7273a6f0d0cceead283c13ff6997 SHA-1: 900e2301f37f3ee0c5ec4055abbde4bbea900591 SHA-256: 96d719c3093aca3b67a868591ac01d8f3eddbe68110399ae623b47d0b3b2ecfb
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://ttraff.me/123?keyword=brawl+stars+iphone+apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4367650/normal_5f875fc94ca72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_5f8c544383fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369149/normal_5f8abc4021ff3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374366/normal_5f88f6049af51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380088/normal_5f8e434254fc5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2bd6cb5-a71d-4710-9814-57056af5a932/degutulivozidedid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ffe06cb-05dc-4565-9f82-abb0bb7bb3de/gadiruxinasududekajivop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf62b847-08bc-47da-8624-2641f3ee3faa/fe_other_disciplines_review_manual_lindeburg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f1ed16-df0f-4f87-a0e4-60abdf1e6e47/82063181917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09979c70-f58d-499b-b02d-f22474f13b84/20420406010.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9559/8271/files/3973297241.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/9955/2663/files/singapore_food_guide_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7303/9255/files/brentwood_academy_lawsuit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8882/2950/files/math_mind_benders_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd53ac9d-421e-4f7d-82ae-0cd53f029c5a/nezomejagutusib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/120bfe0b-610d-4942-98eb-88cde05b29f3/sodajiva.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_off00007390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7390 5112 bytes
SHA-256: 4ffb194b33d252eb7495163f230fdd4ac046155119f087c735bc3b2051efa16f
font_01_sfnt_off000084ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FF 10400 bytes
SHA-256: 4a3a1a6662cb36d46888bc5e70b8a858ea3abf8ce216e708cd9da7f3966c3394

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