Malicious PDF — malware analysis report

Static analysis result for SHA-256 0445b8e5c6173ca4…

MALICIOUS

PDF

40.4 KB Created: 2020-08-19 11:05:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd1334003d1c66322411632ecab25c7 SHA-1: a7c585f812d621966aad6abc5d82e7cbf8b3da79 SHA-256: 0445b8e5c6173ca49147d0e17581a3f82f552b07640167a16bd44f5a3ca262d4
154 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 what appears to be a link farm designed to drive traffic to a malicious redirector. The primary malicious URL identified is https://ttraff.cc/pify?keyword=declare+variable+in+template+angular+7, which is flagged as a known malicious redirector. The document body, though heavily obfuscated, contains references to URLs that are likely part of this scheme.

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.cc/pify?keyword=declare+variable+in+template+angular+7
    • http://juvawasid.redcoyotecyclery.com/uploads/1/3/2/7/132712323/gemebokinati.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/download_adobe_acrobat_reader_for_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/homer_simpson_meme_template.pdf
    • https://cdn.shopify.com/s/files/1/0435/3405/7621/files/noxumejewotapo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7278/2489/files/cancer_treatment_protocols.pdf
    • https://cdn.shopify.com/s/files/1/0429/4672/3996/files/vofolifidefadulezulu.pdf
    • https://cdn.shopify.com/s/files/1/0438/3732/5462/files/lanefo.pdf
    • https://cdn.shopify.com/s/files/1/0430/5059/8562/files/jokakofuzivanowesezolud.pdf
    • https://cdn.shopify.com/s/files/1/0433/4161/1173/files/job_description_in_italiano.pdf
    • https://cdn.shopify.com/s/files/1/0438/5603/5990/files/79931453414.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_off0000543b.bin
e2a3b5b38c46ce23370f6fb15efd17457b36690d2eaa77bedb0fdc4a7e97f441
pdf-font-stream PDF embedded font (sfnt) at offset 0x543B 5356 bytes
font_01_sfnt_off0000666c.bin
46d06a7539c0be47618c3f8a5f780c9cd12b958c9cea17a035d39d479541acd6
pdf-font-stream PDF embedded font (sfnt) at offset 0x666C 14780 bytes