Malicious PDF — malware analysis report

Static analysis result for SHA-256 c290325cf6de9a70…

MALICIOUS

PDF

38.4 KB Created: 2020-10-29 02:43:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 4dfced7747f7af5762701634ea650047 SHA-1: 39eef3d3feef355e0198db9140515255f2875af8 SHA-256: c290325cf6de9a70380aa9910a1bb98aaa7a3ecea6dad11c528a531850af2f93
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document contains a malicious link disguised as a worksheet, which redirects to the URL https://ggtraff.ru/123?keyword=labeling+the+earth%2527s+layers+worksheet. The document also exhibits characteristics of a link farm, embedding numerous other PDF links, many of which point to potentially untrusted sources. The ML classifier strongly flagged this sample as malicious, indicating a high likelihood of malicious intent.

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.
  • 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=labeling+the+earth%2527s+layers+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f90452bd7e9b.pdfIn PDF document text
    • https://wusoxebuwewete.weebly.com/uploads/1/3/4/4/134432123/3e89674b78.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/jukemuvidavawefode.pdfIn PDF document text
    • https://sepenunaxob.weebly.com/uploads/1/3/0/7/130776074/lafax.pdfIn PDF document text
    • https://gemenudotipetal.weebly.com/uploads/1/3/2/6/132695720/1092452.pdfIn PDF document text
    • https://murudogukezopo.weebly.com/uploads/1/3/4/3/134320821/2771072.pdfIn PDF document text
    • https://numuxubolab.weebly.com/uploads/1/3/4/3/134382028/zasegowazilovomogele.pdfIn PDF document text
    • https://reredutubonuki.weebly.com/uploads/1/3/0/7/130775370/e6dff994.pdfIn PDF document text
    • https://kizekusoviwo.weebly.com/uploads/1/3/1/4/131453028/nukulazugebuvaza.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/4aeb12fda.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/2169787.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/saxefi/atkins_induction_phase_food_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/1580/5349/files/survivor_season_7_cast.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2931/8813/files/77689064580.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7888/4759/files/download_line_launcher_latest_version_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/3222/6203/files/samsung_s3_write_on.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5076/1892/files/98791230350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7852/6132/files/naming_molecular_compounds_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8203/2308/files/xojutezalasevadafasige.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7926/2918/files/loridunanutetikodaj.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/synonyms_antonyms_list_competitive_exams.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/bengali_comedy_script.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_off0000518e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x518E 5320 bytes
SHA-256: 1ab9c4bcdef9a19686477f93a9e90dec0b7df5fd4a2d14573f783939312358e8
font_01_sfnt_off000063bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63BD 11832 bytes
SHA-256: 7fd8ec39620d02afd14e8be10f55f2376e77f7088b536f37a0790b02370027a4

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