Malicious PDF — malware analysis report

Static analysis result for SHA-256 6219a6203abaa0dd…

MALICIOUS

PDF

62.6 KB Created: 2020-10-27 19:40:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 4170d8f783c68a2ed1c98de94ae5e284 SHA-1: fff94652e651e6183975deaecf4cd165b6a06dc2 SHA-256: 6219a6203abaa0dd529439e40edcd5e4e6445e0923d08b4e03382dd6cce3312f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to external PDF files hosted on platforms like Weebly, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to known malicious redirector infrastructure at 'https://gettraff.ru/123?keyword=john+r+crestani+reviews'. The document body, though heavily obfuscated, contains the same URL, indicating a lure to a potentially malicious site. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://gettraff.ru/123?keyword=john+r+crestani+reviews In PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/22d6c75a10.pdfIn PDF document text
    • https://jiwepurojal.weebly.com/uploads/1/3/0/7/130775762/kunuliwakemeso.pdfIn PDF document text
    • https://pekedilude.weebly.com/uploads/1/3/4/3/134324883/66e43664.pdfIn PDF document text
    • https://turomanusogagi.weebly.com/uploads/1/3/1/4/131453559/gumededilewe.pdfIn PDF document text
    • https://wegogutez.weebly.com/uploads/1/3/4/3/134310606/730c67515d499f.pdfIn PDF document text
    • https://dedaruxije.weebly.com/uploads/1/3/4/4/134455514/5837576.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://s3.amazonaws.com/jijumupade/effects_of_neo_colonialism_in_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/babanupefufo.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/gugujusajoled.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68a4de57-0b2b-48cd-8b69-3b4876833cf6/42369108.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1636caa1-ea06-415b-9e4a-25e2aaecc952/bofimeviwes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f634bbc-e165-4202-8ee1-e46ff6216cb4/42640032246.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/826394ef-bfac-4d31-b74f-8d6cc0a0ca8c/wejubimikegedavuxojev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b9fe567-0dcd-4da6-b9ee-a2f63ee1be50/lonujuzivaremavedet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9985/5282/files/byjus_mod_apk_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8935/4142/files/klavier_lernen_buch_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7758/0962/files/rovumexaxavapeb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/8410/1804/files/superbeam_apk_download_for_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/9087/9667/files/vokuwiviboguves.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4132/7774/files/accelerated_reading_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8251/3561/files/diguvukasinuzes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/7478/3906/files/98089606805.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BC5 4784 bytes
SHA-256: 2a28df6b3cecf030401ca1afbe8d65b632794758a5d51624c2b400e5ee752317
font_01_sfnt_off0000abf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xABF5 2872 bytes
SHA-256: b37254ae0359916a876da6e607214f9f096e553f8170a75b1e863fe8a7705c00
font_02_sfnt_off0000b7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E5 11444 bytes
SHA-256: 6009fe73ac268d93b170f6b2fb6019438ad1bada000d9f50e3068e0f885fa719
font_03_sfnt_off0000de2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE2C 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e