Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8d707cc50e4af5…

MALICIOUS

PDF

48.3 KB Created: 2020-10-29 02:49:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 882398d315548959a1ff21f97bc5edba SHA-1: 994fd457ddcec7b6275fbac1beaa1cf861bf0468 SHA-256: 4f8d707cc50e4af5cfd44b095730b10208f1b55054126b8cbf4cd149622a8a33
184 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to redirector infrastructure and disposable hosting. The primary malicious URL identified is https://ggtraff.ru/strik?keyword=grave+digger+power+wheels+upgrade, which is flagged as a known malicious redirector. This suggests the document is designed to lure users to malicious sites, likely for phishing or malware distribution.

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.
  • 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.
  • 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/strik?keyword=grave+digger+power+wheels+upgrade In PDF document text
    • https://jasazifo.weebly.com/uploads/1/3/1/4/131437377/8269038.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/xojajuv-mitegejitokuxig.pdfIn PDF document text
    • https://luketekovagitor.weebly.com/uploads/1/3/4/2/134236109/firawarupit.pdfIn PDF document text
    • https://buxivadoga.weebly.com/uploads/1/3/0/7/130740323/vapox.pdfIn PDF document text
    • https://sifumoxijobobo.weebly.com/uploads/1/3/4/4/134493963/6487941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368486/normal_5f8a49c45ee47.pdfIn PDF document text
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/8967434.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f8d83a033884.pdfIn PDF document text
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/pekujoradawizuvujik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412183/normal_5f99d529671c0.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/4ae8255b-bf03-4f15-aa44-ac96f990e7ff/kitchenaid_dishwasher_control_lock.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2880/6806/files/molecular_genetics_review_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f768ee97-8461-490e-9298-077f3dbf7818/rufepuvenazabomasosor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/553a9513-c5d3-47e3-a418-adfc3d5f0f62/wirefixobibobivuw.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/command_prompt_hacks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3572e6ad-c2ea-4c86-832d-596ac841ba4b/97858651161.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/4204/6630/files/gw2_new_mount_wvw.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/butozinujadonenemami.pdfIn PDF document text
    • https://s3.amazonaws.com/febopa/english_story_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7039/7352/files/lavor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc8c187-fe57-4d0d-94a0-a18bc59416ed/95203791814.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D01 5100 bytes
SHA-256: ca2f14f9f0db3f27c77f6e832156ea017026ef5103630fc64bc8f124fd972d11
font_01_sfnt_off00007e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E84 11592 bytes
SHA-256: ffb1c41f2772e971399abbe71dcde3926dd49e75f29ae24344c4e27f9ccbc36e
font_02_sfnt_off0000a567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA567 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176