Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0cad8dac8485b7…

MALICIOUS

PDF

60.3 KB Created: 2020-10-24 06:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 52ed24f486b7f017d3c21159f4902ae8 SHA-1: 9fd31e5da5746f4c1be31531d5f1582374fcef54 SHA-256: 8a0cad8dac8485b7433998da134b9c4be2dea2bac915ce07aac93949eabc5c81
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ggtraff.ru, which is disguised with a keyword related to a book title. This indicates an attempt to direct users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded link suggest it's designed to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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/123?keyword=libro+el+socialismo+traicionado+pdf
    • https://zoveponezewuda.weebly.com/uploads/1/3/0/7/130738822/zifitam.pdf
    • https://porelananov.weebly.com/uploads/1/3/0/7/130775759/tupejumixok.pdf
    • https://vonubaxuted.weebly.com/uploads/1/3/1/4/131452839/letubedobu_finusilikori_dulusuwiva.pdf
    • https://pajujetijawu.weebly.com/uploads/1/3/4/3/134334360/gigikifurabijizeno.pdf
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/lixudefanup.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/xanebavifamopez/fubozuredakirubori.pdf
    • https://s3.amazonaws.com/fofeguj/37844995415.pdf
    • https://s3.amazonaws.com/jazuravazaguz/goat_cesarean_section.pdf
    • https://s3.amazonaws.com/fasanag/31354889683.pdf
    • https://s3.amazonaws.com/tadovu/432192821.pdf
    • https://uploads.strikinglycdn.com/files/43679c40-c581-4e8e-9bce-0506085d5814/muleporu.pdf
    • https://uploads.strikinglycdn.com/files/d7a03b6d-58e4-42aa-85ca-955484b677c0/mubexoragajinozuwag.pdf
    • https://uploads.strikinglycdn.com/files/502dd276-1a06-4765-9549-1a8de32779b2/97499578326.pdf
    • https://uploads.strikinglycdn.com/files/ef74cec5-2526-4a8b-bab7-d3910069e302/rigiwilebenadibitevexi.pdf
    • https://uploads.strikinglycdn.com/files/6b1b5494-a8e9-4c12-ae87-412b0d993813/30564946213.pdf
    • https://uploads.strikinglycdn.com/files/50af8f58-c242-4bd4-a736-a0f076410e4f/52471449523.pdf
    • https://uploads.strikinglycdn.com/files/e03d0c81-d271-4c76-a3fc-946a83f2b4f7/78193369980.pdf
    • https://uploads.strikinglycdn.com/files/b1837590-472d-48ac-ac9b-689884b909e3/le_loup_et_l_agneau_rsum.pdf
    • https://cdn.shopify.com/s/files/1/0429/9603/9833/files/train_sim_world_great_western_express_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/2856/8471/files/el_filibusterismo_book_tagalog_version.pdf
    • https://cdn.shopify.com/s/files/1/0498/7342/0455/files/sms_receive_online_apk.pdf
    • https://cdn.shopify.com/s/files/1/0483/5518/0695/files/jomaponi.pdf
    • https://s3.amazonaws.com/pizexopenaxu/47337404624.pdf
    • https://s3.amazonaws.com/gomakobez/bengali_calendar_2019-_20.pdf
    • https://s3.amazonaws.com/degisapemifa/list_of_architects_in_chennai_with_contact_details.pdf
    • https://s3.amazonaws.com/henghuili-files2/48516522860.pdf
    • https://s3.amazonaws.com/sugaguxagu/bebol.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a943.bin
a4560eb67c989e4a889d847b57bef2ae3abe868af976acbcb16c9f13bfa7ac37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA943 5384 bytes
font_01_sfnt_off0000bb77.bin
56be2621cbd540cf7e8a887884a39c7b704b87d39a421ed7931bccbf5584b047		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB77 11696 bytes

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