Malicious PDF — malware analysis report

Static analysis result for SHA-256 0022bb3aa627ff79…

MALICIOUS

PDF

57.1 KB Created: 2020-08-13 10:59:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: eebdfcca0e9d5a885aa01f744270a58d SHA-1: 5f319622d5edc44f5bde6de30260e1d27fe5c4cd SHA-256: 0022bb3aa627ff79a3cdbab3e11aa86ba3790c46f2889334c268ac270c5008c2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure at ttraff.com. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users to malicious sites. The ML classifier strongly indicated maliciousness, supporting the classification of this PDF as a malicious redirector.

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/wb?keyword=turismo%20na%20ilha%20de%20mocambique%20pdf
    • http://files.alpinespringscounseling.com/uploads/1/3/1/0/131070011/marisipitigurarero.pdf
    • http://vamakaku.jakiaracrew.com/uploads/1/3/0/7/130739591/1988605.pdf
    • http://saloxi.onpointgreatdanes.com/uploads/1/3/1/8/131857101/rovokodu-texotiboj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7188/7767/files/95019309401.pdf
    • https://cdn.shopify.com/s/files/1/0435/9297/4499/files/kohler_courage_20_carburetor.pdf
    • https://cdn.shopify.com/s/files/1/0433/4849/2438/files/historia_de_la_tecnologia_educativa_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0431/9058/3458/files/zetokawobasesikasomad.pdf
    • https://cdn.shopify.com/s/files/1/0431/7465/8216/files/92224860980.pdf
    • https://cdn.shopify.com/s/files/1/0434/8618/3576/files/29850915421.pdf
    • https://cdn.shopify.com/s/files/1/0434/4836/9319/files/95911883548.pdf
    • https://cdn.shopify.com/s/files/1/0434/8113/7316/files/zirosidivotadun.pdf
    • https://cdn.shopify.com/s/files/1/0433/0648/3876/files/1200981650.pdf
    • https://cdn.shopify.com/s/files/1/0429/1877/2903/files/puwifezonuso.pdf
    • https://cdn.shopify.com/s/files/1/0450/7385/8710/files/chalcedon_council.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/19764009676.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_off00009af0.bin
5b96f7642d18b3e9d4266d7e0d268bc2faad045fa422c085d0b350a5d24d6863
pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 5612 bytes
font_01_sfnt_off0000adc8.bin
6483a249f36c2a9b2c023d7dffd5219a41bd84f97d7f04bec08d1e9a3d3c9315
pdf-font-stream PDF embedded font (sfnt) at offset 0xADC8 13272 bytes