Malicious PDF — malware analysis report

Static analysis result for SHA-256 630c30e5841b1bbd…

MALICIOUS

PDF

42.4 KB Created: 2020-09-01 12:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd3ef244134240915f5b33dc81e069dc SHA-1: c7e14c48e630084acf9d84335d1813830812836d SHA-256: 630c30e5841b1bbdb78fce43c898a555659ce18106c1eda4cbd998adc043ab85
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to deliver a secondary payload. The document also contains a large number of links to benign Shopify-hosted PDFs, likely an attempt to manipulate search engine results and disguise the malicious link. The ML classifier strongly indicated maliciousness.

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/wix?keyword=datastax+cassandra++for+mac
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0431/6925/1492/files/paredulitelejajosor.pdf
    • https://cdn.shopify.com/s/files/1/0432/7532/1499/files/kawepadagatujen.pdf
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/sirumovukegavozosuwefale.pdf
    • https://cdn.shopify.com/s/files/1/0438/0449/1937/files/pesojuteferagavo.pdf
    • https://cdn.shopify.com/s/files/1/0438/2323/5232/files/94761799840.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/artificial_intelligence_and_the_future_of_warfare.pdf
    • https://cdn.shopify.com/s/files/1/0429/3492/7513/files/duboludikodewirat.pdf
    • https://cdn.shopify.com/s/files/1/0429/5950/3519/files/55331632062.pdf
    • https://cdn.shopify.com/s/files/1/0445/3682/3972/files/zewopurogotadavuzuliwizuf.pdf
    • https://cdn.shopify.com/s/files/1/0432/5208/9000/files/levixubuxigil.pdf
    • https://cdn.shopify.com/s/files/1/0432/1384/8731/files/edits_for_free_online.pdf
    • https://cdn.shopify.com/s/files/1/0437/8863/2213/files/36976294008.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_off00005b93.bin
c5cc31ef08095a29fe5ca2256bc975af8526fd4392926c9716c84c1fe0043ba1
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B93 4824 bytes
font_01_sfnt_off00006bd1.bin
250034da33b061d6b2a80a32c5ca531114ed8edfc6ead12148d4704239f9de4a
pdf-font-stream PDF embedded font (sfnt) at offset 0x6BD1 10332 bytes
font_02_sfnt_off00008ef6.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF6 4324 bytes