Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bc88d27da3c7972…

MALICIOUS

PDF

40.6 KB Created: 2020-09-18 09:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e5a5c4ecb36b9b51553d8942db91317a SHA-1: bacf72c4e007c3360b6188328ca9e83da6cbbd0a SHA-256: 5bc88d27da3c79728f05f43fc362ebcfbe763d0371162b9e6307ff662b78e9d7
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with the primary one redirecting to a malicious domain associated with SEO spam or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports the malicious intent of directing users to potentially harmful content. No scripts were extracted, but the document body and heuristics point to a lure for malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/wix?keyword=followers+boom+apk+mod+unlimited+coins In PDF document text
    • http://nawepono.lessons-by-alex.com/uploads/1/3/1/3/131398285/tujevedadif.pdfIn PDF document text
    • http://zagidi.archivedsanfrancisco.com/uploads/1/3/1/0/131070493/1248407.pdfIn PDF document text
    • http://nareso.sirtomfoolery.com/uploads/1/3/0/7/130775692/wiwoliveda.pdfIn PDF document text
    • http://woloropub.ambereyesmusic.com/uploads/1/3/0/9/130969060/webesimi-sajezok-vovosopevadido.pdfIn PDF document text
    • http://files.thenovemberinstitute.com/uploads/1/3/0/8/130814591/1675049.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/1/0432/0870/4164/files/76952181759.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/free_templates_for_website_design_in_html.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7351/9272/files/20143919633.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6838/3642/files/jebigu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7133/1742/files/xajogomefinukebatimirit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5052/3029/files/jegelo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7147/0742/files/lagedobawegizeledavilobib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9199/2480/files/pelicula_completa_it_en_espaol_lati.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_off0000600d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x600D 5468 bytes
SHA-256: 01f85882604396974eb05d5137b5bad88e0f4513a233ea83d98df8eb1b0714a0
font_01_sfnt_off0000729f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x729F 10292 bytes
SHA-256: 7f284674037f01cbe23c00d951c5e694d67f99f781ef807c5c387ad9e251d388

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