Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d687b178e3ac9ea…

MALICIOUS

PDF

46.8 KB Created: 2020-10-16 22:42:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 488c3b76ab5cc076a146194160b60b1d SHA-1: 0136f761eb1d22245861808c05fe9dbe409a2dde SHA-256: 8d687b178e3ac9eab758c84adf39b4028e20d4cf095fa6fb8c4dd941169a090c
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.me/123?keyword=coaching+mentoring+and+supervision+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369189/normal_5f88a5ac550d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367964/normal_5f89164f91aee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f895ff8c04e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366031/normal_5f87b639a635d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f886663f0dd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5f87f2b94888a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f874de5cf559.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/4ed6f8eb-06e2-40cf-b11f-90a9ac05b467/domigivazatevinidediviw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e807aee8-86fd-4a33-a009-4933d7d52c99/32057703624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f1a785-08e8-4c73-bcdf-888b59935be9/piwiwul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b136efbe-2b56-47a4-81ce-85588d4aeea5/rosupijujunaluzigutefure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e95b58-ce17-4cd6-8958-0f18c9631d74/13473888311.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06c7f238-8934-4a86-8ef3-6f58d96c48a1/moxajetifewigafewu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6f1f6e-d44f-4a8f-a98d-4da7b4437faf/18339532524.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c989b8ae-e818-4c61-aa40-a3a8b3b3eb76/49524285797.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/5077/3909/files/monect_pc_remote_vip_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/7867/6380/files/john_deere_420_crawler_service_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/final_fantasy_6_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6383/6834/files/37386172369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0478/1670/4159/files/jitimomexudaweragena.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7368/3100/files/33769279151.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0898/1153/files/james_and_the_giant_peach_spider_description.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3255/0810/files/napkin_ring_table_runner.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8675/0916/files/skyrim_skill_tree_meme_generator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/7371/8422/files/zeduwoma.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_off00007986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7986 5504 bytes
SHA-256: ad916e99b4785eab8d6acee668e9de2df0fe92d5eb3c8c8ea54c5f019ba46ee9
font_01_sfnt_off00008c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0F 9836 bytes
SHA-256: 76076b8118b61348bbf9eef51dbbb5933c7a2afb8bf52ab420c7ef0b466cfc48