Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcd5b6acb87061a1…

MALICIOUS

PDF

41.5 KB Created: 2020-07-10 21:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 263f60bd288febb04b959aa8d5a70c8e SHA-1: 8e115d25985df5fa4d6cd9ba9ca94bf761afe67f SHA-256: fcd5b6acb87061a14432a844e7d3eb2c3ff500862d04e811c47149ffb1dab39d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link farm designed to appear as search results for 'Danfoss high pressure switch pdf', but the primary link redirects to malicious infrastructure at ttraff.cc. The ML classifier strongly indicated maliciousness, and the PDF structure suggests a link farm with numerous external PDF links, likely for SEO poisoning or traffic redirection. No scripts were extracted from this sample.

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/wb?keyword=danfoss%20high%20pressure%20switch%20pdf
    • http://files.mafaldapaiva.com/uploads/1/3/0/7/130775510/0d7617a0a1.pdf
    • http://files.courtneykobata.com/uploads/1/3/1/3/131383621/kamopuf.pdf
    • http://files.serendipityboutique.online/uploads/1/3/1/3/131379789/57f42.pdf
    • http://files.selectivenetworks.com/uploads/1/3/0/7/130775817/kirako.pdf
    • http://files.brunopernadas.com/uploads/1/3/0/8/130814529/a42d4399153494.pdf
    • http://files.hscfair.com/uploads/1/3/1/3/131380951/c37b842.pdf
    • http://files.fuerschbachpublishing.com/uploads/1/3/1/3/131383864/gopimu-keduga.pdf
    • http://files.emergefoundation.net/uploads/1/3/0/8/130814909/d29d758b3.pdf
    • http://files.jimglasscorvette.com/uploads/1/3/2/6/132695248/1184372.pdf
    • https://tuvelajago.files.wordpress.com/2020/06/89695082701.pdf
    • https://dijojaf.files.wordpress.com/2020/07/pebevajilesivilop.pdf
    • https://dapovoraxa30749229.files.wordpress.com/2020/06/55837850263.pdf
    • https://numewim.files.wordpress.com/2020/06/77568912014.pdf
    • https://marupuk.files.wordpress.com/2020/06/wefala.pdf
    • https://xepodifi.files.wordpress.com/2020/06/79037087557.pdf
    • https://nurosikimigo.files.wordpress.com/2020/07/87182707217.pdf
    • https://cdn.shopify.com/s/files/1/0431/5650/4744/files/pamejifin.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vawis.pdf
    • https://cdn.shopify.com/s/files/1/0432/9802/9733/files/9360554493.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059ec.bin
903394880d9cbfda619ab4df18fcb9d2b5830d97d76bdc91ec815c49a6dbefca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59EC 5356 bytes
font_01_sfnt_off00006c32.bin
0a63c6aa31045bb3b4c0120bc4096511f2b6a81b2f0bd82a4a1d66cef33cf80b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C32 14392 bytes

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