Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d1dbc08349c182f…

MALICIOUS

PDF

46.3 KB Created: 2020-08-04 00:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 117d5e5cb2e3e4a546c78507d031c037 SHA-1: f8b5bffb50c36aebe2e10cb74c965eba24dfe325 SHA-256: 0d1dbc08349c182f52075e1c95ca0352e769c1755b219298a463ed71793b7a56
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The document body, though partially obfuscated, contains text related to 'pdf to word converter program' and a URL pointing to a redirector. The presence of a link farm and ML classification further support its malicious nature, likely serving as a lure for phishing or malware distribution.

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/pify?keyword=pdf+to+word+converter+program
    • http://files.salvageddesigns.org/uploads/1/3/0/8/130814353/mumiparazudos_vilizon_fededim.pdf
    • http://files.adoptadventure.com/uploads/1/3/2/6/132696512/f74aa0b320e1359.pdf
    • http://files.laurenhollick.com/uploads/1/3/1/4/131437362/xajefetifedagifub.pdf
    • http://files.brokenhornevents.com/uploads/1/3/2/6/132695782/85244f44e1e44d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0437/8607/6309/files/pusaxagepolof.pdf
    • https://cdn.shopify.com/s/files/1/0434/7474/7558/files/colab_how_to_print_gpu.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/32377204601.pdf
    • https://cdn.shopify.com/s/files/1/0439/8533/8526/files/xmlhttprequest_post_json.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/39831790956.pdf
    • https://cdn.shopify.com/s/files/1/0432/3577/0535/files/redstone_active_1_hours.pdf
    • https://cdn.shopify.com/s/files/1/0428/6405/0332/files/fopaxivefotedekowawob.pdf
    • https://cdn.shopify.com/s/files/1/0430/8821/6217/files/malubizutawugifakuwelig.pdf
    • https://cdn.shopify.com/s/files/1/0435/5152/2977/files/troy_built_tiller_attachments.pdf
    • https://cdn.shopify.com/s/files/1/0432/4252/0739/files/1397170808.pdf
    • https://cdn.shopify.com/s/files/1/0440/2338/2166/files/16516184296.pdf
    • https://cdn.shopify.com/s/files/1/0431/1980/4567/files/36449645534.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/50537202024.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068cc.bin
559d3952ac52c796a0cb80578197b10755e00d3ee836d3413771bfe2ef802c15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68CC 5156 bytes
font_01_sfnt_off00007a48.bin
06fc1d55926d4e0a439f5f11431da472471afe1a845e7475c75670ebc268b936		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A48 10428 bytes
font_02_sfnt_off00009db5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9DB5 4324 bytes

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