Malicious PDF — malware analysis report

Static analysis result for SHA-256 26c5e9f39a182812…

MALICIOUS

PDF

37.0 KB Created: 2020-09-19 10:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001b8118b131a653fb644b1700b7736c SHA-1: 2fea09ba6e81329f8f0f019db9196929994d92ad SHA-256: 26c5e9f39a182812d28e258482b91863f487febe260669893222b1884506d106
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, which is likely intended to lead the user to a malicious site. The document body, though heavily obfuscated, contains the same URL and appears to be a lure for a 'purpled texture pack 1.8.9'. The presence of a large number of external PDF links, many pointing to benign Shopify domains, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted from this sample.

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.me/wix?keyword=purpled+texture+pack+1.8.9
    • http://zekoseri.allsaintshighwycombe.org/uploads/1/3/2/7/132740186/1795533.pdf
    • http://files.projecteva.org/uploads/1/3/2/7/132740185/sufiduzevovezamogot.pdf
    • http://puwazife.buildingpeacefulcommunity.org/uploads/1/3/1/4/131437508/regede.pdf
    • http://vefoluduv.tattered-dragon.com/uploads/1/3/1/0/131070313/c0b2ae1.pdf
    • http://files.cambiadentallab.com/uploads/1/3/1/6/131606789/movur-ranofan-poven.pdf
    • https://cdn.shopify.com/s/files/1/0431/9870/9917/files/ncic_code_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4882/files/loxotedovenirigawalole.pdf
    • https://cdn.shopify.com/s/files/1/0435/9490/7810/files/royce_gracie_vs_matt_hughes.pdf
    • https://cdn.shopify.com/s/files/1/0481/1430/3139/files/iron_man_2_unblocked_google_drive.pdf
    • https://cdn.shopify.com/s/files/1/0432/9350/7739/files/96742797737.pdf
    • https://cdn.shopify.com/s/files/1/0434/2874/1285/files/s_chand_biology_book_class_9.pdf
    • https://cdn.shopify.com/s/files/1/0431/1197/3026/files/jipejilivol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6866/1660/files/ios_notification_sound_wav.pdf
    • https://cdn.shopify.com/s/files/1/0432/9019/8180/files/ground_to_air_signals.pdf
    • https://cdn.shopify.com/s/files/1/0437/7464/0286/files/28987657950.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_off00005296.bin
9db1c0c60b2789de18581fdc2af4b406fbe2ca5bf2a463b1b10f151e3e274442		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5296 5456 bytes
font_01_sfnt_off0000653d.bin
085be3be27760b58bf42ed2c0cca80a2f055b5392698a4f91bbc3c6d458906be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x653D 9896 bytes

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