Malicious PDF — malware analysis report

Static analysis result for SHA-256 f641c6c12aeee58b…

MALICIOUS

PDF

47.5 KB Created: 2020-11-03 00:24:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e4427f9068c82d51b367d0b496ee7208 SHA-1: 1677be4194f3d92836fbc45c05dff01f3fc21a42 SHA-256: f641c6c12aeee58b2c7161e79e087cfc33c971bb872c9f4d72da11acbf0afc36
162 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.me/123?keyword=viva+video+editor+apk+pc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4375503/normal_5f92f9961e55d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374848/normal_5f932e49e03f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7153/6804/files/sasejalonarunibosupabike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9044/2917/files/zanella_way_chico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/5518/2510/files/auraglow_teeth_whitening_kit_safe.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/59927808502.pdfIn PDF document text
    • https://s3.amazonaws.com/damerirazib/initiation_of_translation_in_eukaryotes.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4218/2563/files/roper_washer_rtw4516fw2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2754/4236/files/67822028543.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/4546165318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/0185/0273/files/the_lost_child_story.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1417/4900/files/47104695592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8525/9456/files/lasozozisasigijesas.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/csulb_map_parking.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/7766/2875/files/human_rights_values_and_ethics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d696d90-6cd7-4c28-affe-5f84c6aafdfb/vetagixineke.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_off000070ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 4944 bytes
SHA-256: d35356047fe9e86e0c0156af841e4f742c13ae2a0e39001aed91f5bcbd28d09e
font_01_sfnt_off000081b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 14932 bytes
SHA-256: 8331466dc74065c6abf82a86a56349fb2bd6851babd6a49bb62401de959a9748

Open this report in the interactive analyzer, or submit your own file for analysis.