Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c825b4c239656af…

MALICIOUS

PDF

41.9 KB Created: 2020-08-30 14:13:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0296fba7663d39cf65cdbfa0596b376a SHA-1: 0e6d291ae4df41b5f576055e964e2182c66a16d2 SHA-256: 6c825b4c239656afbf01225b2eb51378eed8c3441f6985dd9979f1e69b434a23
162 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.com, which is likely used to distribute malware or facilitate phishing. The document body and heuristics indicate a lure for software registration or download, attempting to trick the user into clicking the malicious link. The presence of numerous external PDF links suggests a link farm used for SEO poisoning to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/wix?keyword=letasoft+sound+booster+registration
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f4de5e_d78f88c7475247d3a0d081aa40565f08.pdf
    • https://static.usrfiles.com/ugd/ea78e0_4961f50ef47e447ea7b53c97e7a518e7.pdf
    • https://static.usrfiles.com/ugd/b8c837_4b3d2e4acaca41d0aa66ff906e5fabe5.pdf
    • https://cdn.shopify.com/s/files/1/0429/8381/7375/files/91484966184.pdf
    • https://cdn.shopify.com/s/files/1/0441/0766/1464/files/quantitative_risk_assessment_methods.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5183/files/free_bedtime_stories_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0432/0342/8515/files/b_pharmacy_1st_year_organic_chemistry_notes.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/autoestima_en_los_adolescentes.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/neopets_shop_directory.pdf
    • https://cdn.shopify.com/s/files/1/0433/0032/3478/files/wajebekewavejimena.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/types_of_cancer_and_their_causes.pdf
    • https://cdn.shopify.com/s/files/1/0464/7400/2584/files/zobomibizufedigube.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/dewomatarolokakutafago.pdf
    • https://cdn.shopify.com/s/files/1/0430/4322/5751/files/bonoj.pdf
    • https://cdn.shopify.com/s/files/1/0429/2454/0071/files/38568990713.pdf
    • https://cdn.shopify.com/s/files/1/0437/7057/7045/files/lopizozefomu.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065b0.bin
3e794082b07c8397b47438b45041453d1cccb18b630afc949de1514d4c0e5297		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 5124 bytes
font_01_sfnt_off00007726.bin
856d5a2564ecb141adbdb85a9ef89702414361bb9d2374e6fd66c4ecc1dc99fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7726 10436 bytes

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