Malicious PDF — malware analysis report

Static analysis result for SHA-256 ffd7b531a91214b1…

MALICIOUS

PDF

73.1 KB Created: 2020-10-17 01:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a6f467e7bc54903e6848401d8c1a4741 SHA-1: 6ca92979c071e91203b726a401fe9b14e7ceba77 SHA-256: ffd7b531a91214b1869b3d374dc7110b1ac49f120e7d8723a048e9853788e947
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/123?keyword=crossfire+mobile+mod+apk+offline In PDF document text
    • https://texitanoz.weebly.com/uploads/1/3/0/7/130739996/sutonolob-taniwov.pdfIn PDF document text
    • https://wefejakero.weebly.com/uploads/1/3/0/8/130814310/2311924.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/5026136.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/8452732.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/8260600.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/7360136.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/0b59beb5.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/bawap.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/d63b4.pdfIn PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/tizuf.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/9494234.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/24c9c987-2dd3-426c-b0a9-ed7a73863a58/53630977029.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22c1b1f8-8d7a-44af-97b8-d55510a9fe34/38598110175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1696bda4-19e6-4529-9fa8-cb7c61657f6a/wukixepukenit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de578741-2232-4648-8c5e-cd04974a6e32/15327447587.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0d3a266-761a-4d6a-90b3-b3b41729e0a9/36642510505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab5decfe-cce7-4569-ae96-988a32120c95/kaduxunamoxigizoduniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb8fede8-54c9-4886-af91-e6d447e946e3/wefuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1883/8435/files/49325001758.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0495/1428/3176/files/tomb_raider_costume_angelina_jolie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7587/1928/files/mha_heroes_rising_full_movie_dub_reddit.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 21756 bytes
SHA-256: 28719e9bc3731de2d1725f581f2e1f76c4a35649ffa44bb3003fb45babce81bc
font_01_sfnt_off0000bbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB0 5120 bytes
SHA-256: f3b8e5b329f60e75705eecaa5b3e61b6a5cd0794e76740d5384a5466f279c3d7
font_02_sfnt_off0000ccf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF3 11160 bytes
SHA-256: c5bad48d7603d005df44fdb28725dc7f43c9774664e35747ce1ad6bda7a64d9a
font_03_sfnt_off0000f368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF368 16096 bytes
SHA-256: c83653c06c050b5620c27d9467f96ae76c095100a35812f59a939b75fae7bdf2
font_04_sfnt_off0001082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1082A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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