Malicious PDF — malware analysis report

Static analysis result for SHA-256 888c1716925b767c…

MALICIOUS

PDF

42.5 KB Created: 2020-10-27 08:10:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd0125f1ae3beb507aff784ed543a851 SHA-1: be9680148ec190023cd6079cf2d6704303f3b22b SHA-256: 888c1716925b767cc8cc9dec6654327d62702bb62a3f0eb0b99e819afa7993fe
194 Risk Score

Malware Insights

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

The PDF contains a link farm and a lure consistent with advance-fee scams, aiming to trick users into clicking malicious links. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' indicates that the primary URL leads to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://cctraff.ru/strik?keyword=a8+3d+printer+upgrades
    • https://fuparududewon.weebly.com/uploads/1/3/1/8/131856041/toripujo.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/kefokug-gojejaxokel-xepibatuwofe-fitemunodu.pdf
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/7805117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tadovu/zasivulabagikujowitela.pdf
    • https://s3.amazonaws.com/bisegilupuf/autocad_snap_not_working.pdf
    • https://s3.amazonaws.com/zufojadibi/bullet_journal_ideas_for_beginners.pdf
    • https://s3.amazonaws.com/bawalidamovidud/affirmative_negative_and_interrogative_sentences.pdf
    • https://s3.amazonaws.com/widiku/nofuwapamozubupezunefo.pdf
    • https://s3.amazonaws.com/bikikanafopavu/curriculum_design.pdf
    • https://cdn.shopify.com/s/files/1/0484/2402/6262/files/acts_12_kjv_commentary.pdf
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3934721782.pdf
    • https://cdn.shopify.com/s/files/1/0501/8052/2138/files/sesipakesiwevo.pdf
    • https://cdn.shopify.com/s/files/1/0484/9929/4363/files/waluzowipagumajadu.pdf
    • https://uploads.strikinglycdn.com/files/52ca253b-0e71-4c55-9285-6dc821339499/chatytv_canal_caracol.pdf
    • https://uploads.strikinglycdn.com/files/7455a903-f079-4b5b-b02b-0d7664e8da8a/datixugan.pdf
    • https://uploads.strikinglycdn.com/files/6f812d26-e5a0-4d2a-a3ba-092a70de48a4/99258126052.pdf
    • https://uploads.strikinglycdn.com/files/16c30a99-8533-4f59-a60e-66b74bfd6726/melexatozepurovulef.pdf
    • https://uploads.strikinglycdn.com/files/cb274ee9-2263-461d-aaea-50009419894c/29049994322.pdf
    • https://uploads.strikinglycdn.com/files/9ad03a8b-796c-45ec-ae66-5eb384be2de0/gerod.pdf
    • https://uploads.strikinglycdn.com/files/ffc7454b-569b-49a4-abdc-61ec37d27470/kagan_strategy_posters.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_off00006940.bin
4f97ec43220c008f5ac061f92cb0dfb232d5905dc8c7b6190b64271837b6f82c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6940 5444 bytes
font_01_sfnt_off00007bc5.bin
78fd8c1ca09b8d90fbcd51057229c8e165bfbafcf982ae34e5bcbc35afceac11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BC5 9820 bytes

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