Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4668ef63471238c…

MALICIOUS

PDF

42.2 KB Created: 2020-08-08 14:05:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a66f4a714a3f0fe96a6441dc85b92c25 SHA-1: adb73d027d27cfdfca61d453f5b761c1610eef5f SHA-256: c4668ef63471238cf2a7cdb042f3b8640757ccbba66fcde3fdf9a304aeeae586
150 Risk Score

Malware Insights

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

The PDF document contains a high number of embedded links, with a critical heuristic firing for a malicious redirector link to 'ttraff.com'. The document body appears to be obfuscated binary data, but the presence of numerous links, including those hosted on Shopify, suggests a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=herniated+lumbar+disc+exercises+pdf
    • http://files.hail-vegan.com/uploads/1/3/0/7/130775825/silukevato.pdf
    • http://peluko.gaggiamanualservice.com/uploads/1/3/0/8/130814297/pinaziv-lewom-lekono.pdf
    • http://gukof.dannyderrick.com/uploads/1/3/1/3/131380005/f0c3e2719dc7a.pdf
    • http://files.glitzstudiodesigns.com/uploads/1/3/2/8/132814768/8288125.pdf
    • http://files.azqualityremodeling.com/uploads/1/3/0/7/130776483/voborufabebi-setufapa-xulovevat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1619/0112/files/tamobegofivaw.pdf
    • https://cdn.shopify.com/s/files/1/0432/7958/1352/files/robun.pdf
    • https://cdn.shopify.com/s/files/1/0433/8673/2707/files/doribokubasulobukoje.pdf
    • https://cdn.shopify.com/s/files/1/0433/6658/0382/files/ross_enamait.pdf
    • https://cdn.shopify.com/s/files/1/0429/7133/2767/files/tuveduzijisulesulabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/8181/7495/files/detakejiverawulibedel.pdf
    • https://cdn.shopify.com/s/files/1/0438/9847/0555/files/brucellose_physiopathologie.pdf
    • https://cdn.shopify.com/s/files/1/0428/3462/4668/files/fimiludamopidu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0448/6055/files/2108141206.pdf
    • https://cdn.shopify.com/s/files/1/0430/2585/8714/files/guxegaribekanewadej.pdf
    • https://cdn.shopify.com/s/files/1/0434/2910/1735/files/github_git_bash.pdf
    • https://cdn.shopify.com/s/files/1/0438/4777/8469/files/32377359295.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_off00006714.bin
1ead3727c65c5f33b6e64f9dd712ad68a1df665afb913e750bed3effafef873d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6714 5468 bytes
font_01_sfnt_off00007992.bin
60bcfb3590bbaa127347f36d587879edaeea12234b89a269ff346fd7232a9620		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7992 9920 bytes

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