Malicious PDF — malware analysis report

Static analysis result for SHA-256 dac6e772cdf11809…

MALICIOUS

PDF

40.0 KB Created: 2020-08-08 15:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 40b93b805aa2db62021068a094fef153 SHA-1: d8d1cc984afa42fe21889f848e62861f00f50018 SHA-256: dac6e772cdf11809e9c35fbda45cf9a589f2ca16d66c2155d18f80946d11f553
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, masquerading as educational content, which is a common lure for phishing or malware delivery. One of the primary links, 'https://ttraff.ru/pify?keyword=solving+radical+equations+algebra+2+worksheet+pdf', is identified as a malicious redirector. The file's structure and the presence of many external links suggest a link farm or SEO poisoning tactic to distribute malicious content.

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.ru/pify?keyword=solving+radical+equations+algebra+2+worksheet+pdf
    • http://files.wolvesdenranch.com/uploads/1/3/2/6/132683000/d1013611069702.pdf
    • http://files.prestigesis.com/uploads/1/3/1/4/131408970/427911.pdf
    • http://files.johndancerviolins.com/uploads/1/3/0/7/130738548/37107cb01fd24b.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/60712603282.pdf
    • https://cdn.shopify.com/s/files/1/0440/9376/7832/files/personal_pronouns_worksheet_grade_3.pdf
    • https://cdn.shopify.com/s/files/1/0436/4402/7038/files/8881662747.pdf
    • https://cdn.shopify.com/s/files/1/0430/8130/2167/files/70850276343.pdf
    • https://cdn.shopify.com/s/files/1/0437/5465/1799/files/zetus.pdf
    • https://cdn.shopify.com/s/files/1/0429/4960/7590/files/pelowixag.pdf
    • https://cdn.shopify.com/s/files/1/0433/8312/8214/files/94030571879.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0365/files/13319765132.pdf
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/saxopipirolikemi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004725.bin
d067b927467b9c31295a9847158bfad0e286b8639ccadeaee460313623731f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4725 6016 bytes
font_01_sfnt_off00005b9a.bin
3fcef14dbaa9e8e104ba45418aa5bd7798b1d54ee5b7b5754f01bd60b8d49bf6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9A 12896 bytes
font_02_sfnt_off000084b0.bin
7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B0 4324 bytes

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