Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd893a40cf4e0d39…

MALICIOUS

PDF

53.7 KB Created: 2020-08-24 07:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3590cf4db448291b92cfd4a0dfd169b4 SHA-1: df8d3a5b7ee029d3b9a43b6c9c3977de4f8e967a SHA-256: dd893a40cf4e0d39e25c11695610be40188a4a82614afcf2e683af6a56e3377f
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is designed to lead users to malicious content. The document body, though heavily obfuscated, contains the same URL and a keyword related to the link, suggesting it's part of a lure. The PDF also hosts a large number of external links, many pointing to shopify.com, which is likely an attempt to manipulate search engine results for SEO poisoning. 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/pify?keyword=coral+reef+is+formed+by
    • http://vefixozak.jeteliteaviation.com/uploads/1/3/0/8/130873826/xadiperekobokemer.pdf
    • http://files.flockofbirdsmosaics.org/uploads/1/3/0/8/130874180/1991be5e2f.pdf
    • http://files.shelliemorris.net/uploads/1/3/1/1/131164113/wajixenaradujojopet.pdf
    • http://sojuvaku.worldclasssurftrips.com/uploads/1/3/1/0/131070112/34a0dc17e0c4be.pdf
    • https://cdn.shopify.com/s/files/1/0430/0649/2823/files/23198689573.pdf
    • https://cdn.shopify.com/s/files/1/0430/7078/3645/files/41814205948.pdf
    • https://cdn.shopify.com/s/files/1/0436/4559/9904/files/99308938803.pdf
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/62467334291.pdf
    • https://cdn.shopify.com/s/files/1/0432/1506/1153/files/95977345543.pdf
    • https://cdn.shopify.com/s/files/1/0428/6529/5526/files/grand_opening_postcard_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/9696/4261/files/tigazimowivot.pdf
    • https://cdn.shopify.com/s/files/1/0434/4381/4560/files/44405396278.pdf
    • https://cdn.shopify.com/s/files/1/0433/1474/1413/files/39953089008.pdf
    • https://cdn.shopify.com/s/files/1/0432/6067/4198/files/92430613406.pdf
    • https://cdn.shopify.com/s/files/1/0432/3124/8539/files/82532608965.pdf
    • https://cdn.shopify.com/s/files/1/0434/7016/0032/files/duzolorunajo.pdf
    • https://cdn.shopify.com/s/files/1/0428/2993/8855/files/lezog.pdf
    • https://cdn.shopify.com/s/files/1/0461/9458/9847/files/13731284893.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/
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/file

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000975f.bin
600d9aadbbfb23849e98d8c4ac1ba4b87840a59497f51fbd3731b5fa473a556c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x975F 5200 bytes
font_01_sfnt_off0000a8f6.bin
e80cc9cc82ecfec57680d32100cc2c5eb9b65fb13cb66f29f65ed1919f9af749		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F6 9648 bytes

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