Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d38112660ba8bca…

MALICIOUS

PDF

41.0 KB Created: 2020-08-29 01:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c0f04491e117436791edf55e57dbc7d1 SHA-1: e3107aaf8730297a27594c18727a490625e3a37c SHA-256: 2d38112660ba8bca15cc88894659dcd9bfa5668bd3ed4c015ceaddea6d277e3a
250 Risk Score

Malware Insights

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

This PDF document is designed to lure users into clicking on invisible, repeated links. These links redirect to the URL https://ttraff.ru/wix?keyword=kailyn+teen+model.com, which is flagged as a malicious redirector. The document's structure and the presence of numerous embedded links, many pointing to benign Shopify URLs, suggest a SEO poisoning or link farm tactic to obscure the malicious destination. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
    PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
  • 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.
  • Clickable PDF combines external action with parser-evasion structure high PDF_ACTION_PARSER_EVASION
    PDF has an external clickable URI together with object graph or xref structures that make parsers disagree, such as divergent duplicate objects, parser divergence, or xref offset mismatch. That combination is stronger than a plain link: the document is both an outward-action carrier and a parser-confusion/evasion sample.
  • 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.ru/wix?keyword=kailyn+teen+model.com
    • https://cdn.shopify.com/s/files/1/0428/4334/0956/files/osaka_metro_map_english.pdf
    • https://cdn.shopify.com/s/files/1/0439/6898/7294/files/cool_java_code.pdf
    • https://cdn.shopify.com/s/files/1/0431/7249/5526/files/libamux.pdf
    • https://cdn.shopify.com/s/files/1/0429/7955/7535/files/download_amar_chitra_katha_comics_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/1832/0034/files/applied_ballistics_long_range_shooting.pdf
    • https://cdn.shopify.com/s/files/1/0432/3606/5438/files/node._js_require_path.pdf
    • https://cdn.shopify.com/s/files/1/0461/9829/2638/files/41960684003.pdf
    • https://cdn.shopify.com/s/files/1/0436/0011/7928/files/fiwuwapif.pdf
    • https://cdn.shopify.com/s/files/1/0430/0662/3903/files/79886376210.pdf
    • https://cdn.shopify.com/s/files/1/0428/8951/1068/files/butlins_skegness_map_2020.pdf
    • https://cdn.shopify.com/s/files/1/0428/1470/1735/files/lenudevezobimameximem.pdf
    • https://cdn.shopify.com/s/files/1/0431/8907/6117/files/mudamipebijokavefinepawez.pdf
    • https://cdn.shopify.com/s/files/1/0431/9540/0356/files/fonomisudedafujaxupaz.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_off00006362.bin
b2879712f6bfdf2c176e5356fc452ae431d30e1a09cb56552a184771881dc0d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6362 4912 bytes
font_01_sfnt_off00007412.bin
d28ae81803336eb9a7336346d0270fc52c32a68539eb492bd76fae04288168c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7412 10412 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.