Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b1b9bd1ee385e84…

MALICIOUS

PDF

37.1 KB Created: 2020-10-15 12:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c593de9b69e9c872333480f482785c80 SHA-1: 973f185a0facbe8c6ea3b0e74bb0bead16e051b3 SHA-256: 9b1b9bd1ee385e842fa70f08854ac2c44f998dd6fa894f525230502c67002905
184 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or redirector services, indicating a link farm designed to distribute traffic to potentially malicious sites. The primary redirector URL is https://ttraff.link/pify?keyword=microreactors+in+organic+synthesis+and+catalysis+pdf, which is flagged as malicious. The document body, though partially obfuscated, also contains this URL and other PDF links, suggesting a lure to external content.

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://ttraff.link/pify?keyword=microreactors+in+organic+synthesis+and+catalysis+pdf In PDF document text
    • https://pobezewimo.weebly.com/uploads/1/3/2/6/132681951/jolul_zeruzosulivob_bazikikizoladu_menepolepon.pdfIn PDF document text
    • https://tenagudewujuga.weebly.com/uploads/1/3/1/1/131164273/tefavusixafoba.pdfIn PDF document text
    • https://kuwofepex.weebly.com/uploads/1/3/2/7/132740654/rimawutevotom_bubiragageka.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/laresisif_kigadebokenub_bajutinerid.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/sosekazazalapebu.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/nodimakovej_xosukukaleropo.pdfIn PDF document text
    • https://fanawilixu.weebly.com/uploads/1/3/1/4/131408209/94f0a72fe2.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/suvex-xebubonozov-gavubukegago.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/jixidused.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_5f87e26347cfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f8707148b3a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_5f8775167c325.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368237/normal_5f87e39511fec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366047/normal_5f87e91801642.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/1/0497/9127/1073/files/48547008669.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2007/4663/files/bunn_vpr_series_not_brewing.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/1879/2345/files/favorite_british_invasion_songs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9320/7461/files/red_letters_by_crowder_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/7745/8850/files/diwibozakijigaw.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_off00005194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5194 5524 bytes
SHA-256: b5789968b17ca39c0fc1c2d4e5aaff9f1ec768cdb720d0519345988174cd3557
font_01_sfnt_off0000645c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x645C 10072 bytes
SHA-256: 8d80909a54f1a4f5b4146f6b268b2f3065fc0a45430feb96428e1e30ade41f32