Malicious PDF — malware analysis report

Static analysis result for SHA-256 e718702a760e622e…

MALICIOUS

PDF

42.1 KB Created: 2020-08-19 18:20:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 890bc2f31ddce81486ef8b06e6dadd97 SHA-1: 727fb1742c0387418ba65bcb5d112889311eadb2 SHA-256: e718702a760e622ea866b23e61ba4403528e9ec43023e910950ed86cb441aaf7
120 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK pointing to ttraff.com. Another critical heuristic, PDF_SEO_LINK_FARM, indicates a large number of external PDF links, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the URL https://ttraff.com/pify?keyword=hundreds+chart+worksheets+for+kindergarten, suggesting a lure to a malicious redirector disguised as educational material.

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=hundreds+chart+worksheets+for+kindergarten
    • http://files.oregonoutbackadventures.com/uploads/1/3/1/8/131856306/javomojofitiwudefux.pdf
    • http://files.bloomwildrose.ca/uploads/1/3/0/7/130775197/laxezese.pdf
    • https://cdn.shopify.com/s/files/1/0435/5417/7185/files/fejotaroxala.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2536/files/an_introduction_to_accounting_and_financial_management.pdf
    • https://cdn.shopify.com/s/files/1/0432/6119/8500/files/66294103425.pdf
    • https://cdn.shopify.com/s/files/1/0430/6770/3457/files/garis_besar_sejarah_amerika_serikat.pdf
    • https://cdn.shopify.com/s/files/1/0433/5868/3294/files/autosar_exp_layered_software_architecture.pdf
    • https://cdn.shopify.com/s/files/1/0437/6100/8791/files/analysis_of_merge_sort_algorithm.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/16481260084.pdf
    • https://cdn.shopify.com/s/files/1/0430/0043/0746/files/pleural_effusion_diagnosis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8616/7702/files/59747537305.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/87356966283.pdf
    • https://cdn.shopify.com/s/files/1/0435/5457/0399/files/45400952015.pdf
    • https://cdn.shopify.com/s/files/1/0428/9980/0217/files/61704657623.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_off0000668e.bin
37935f30b4c37886332864833eb685d92dd971a1fc194afc5086548986974044		 pdf-font-stream PDF embedded font (sfnt) at offset 0x668E 5368 bytes
font_01_sfnt_off000078d7.bin
b122be07f1002cb34a2ec09d93e23045a95165cc3b576be6c83c7aeb90836a93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78D7 10180 bytes

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