Malicious PDF — malware analysis report

Static analysis result for SHA-256 6997b6a53d956de1…

MALICIOUS

PDF

44.5 KB Created: 2020-09-02 08:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56f28d567864b9a1f0ffcd6b3db70a17 SHA-1: 36e328390c5a3d25d87f3f8a6c0aa774b61ebc58 SHA-256: 6997b6a53d956de1b62cd04fa534f9959c69224ca51f62f49674442587175783
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.link, which is used to obscure the final destination. The document body, though heavily obfuscated, contains text related to accessing Facebook information and an urgency lure, suggesting a phishing attempt. The presence of numerous external PDF links, many pointing to benign content, indicates a link farm strategy, potentially to improve SEO for malicious links or to host further malicious content.

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.link/wix?keyword=accessing+and+ing+your+facebook+info
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b13fd1_c1f04b2f0f064362afea797141543735.pdf
    • https://static.usrfiles.com/ugd/9904c2_b0ca4315123049ce836718be6e99da16.pdf
    • https://static.usrfiles.com/ugd/e42ee3_03aa20047c6e4ab3b0e354d2a1815935.pdf
    • https://static.usrfiles.com/ugd/b8c837_51b0f10196fc49fb995db2fd324f2de6.pdf
    • https://static.usrfiles.com/ugd/2b3f46_60e079bf39a44606ae25a0e826874ae7.pdf
    • https://cdn.shopify.com/s/files/1/0431/2973/3282/files/mibawasug.pdf
    • https://cdn.shopify.com/s/files/1/0430/0311/7721/files/libros_de_bioclimatica.pdf
    • https://cdn.shopify.com/s/files/1/0431/7229/8918/files/86391132555.pdf
    • https://cdn.shopify.com/s/files/1/0429/8620/9439/files/xugugerewowis.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/lixilolizudiwej.pdf
    • https://cdn.shopify.com/s/files/1/0430/6350/9143/files/10._2_arithmetic_sequences_and_series_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/5404/6111/files/89824378266.pdf
    • https://cdn.shopify.com/s/files/1/0434/0432/9127/files/ergonomics_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/2292/6492/files/74277123270.pdf
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/josegegunasurawefetara.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_off00006b0b.bin
2c75bb8ea36f373b976228e537a5cdbbcb7c290568c985a8043e58e8343565cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0B 5452 bytes
font_01_sfnt_off00007db5.bin
630c4407c72fd31ecad978de4bc9e21c623d5f89dec4eec078e09af98fcbdf7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB5 12244 bytes

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