Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e74d7989a2e5b57…

MALICIOUS

PDF

40.2 KB Created: 2020-08-23 13:33:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 55160223972a90a3023792bcf71fcc55 SHA-1: 0077ed2188142c6fa06a5d3d7e36986b5430e523 SHA-256: 2e74d7989a2e5b5726f0a5d6a9b602c9342214e1ae74df3670db8454ad2477b4
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a primary URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'free english worksheets for 8 year olds' and the malicious URL, suggesting a lure to entice users to click through to malicious infrastructure. No scripts were extracted from this sample.

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=free+english+worksheets+for+8+year+olds
    • http://files.wfyouth.org/uploads/1/3/1/0/131070866/fcc58.pdf
    • https://cdn.shopify.com/s/files/1/0437/5740/4309/files/bachmann_branchline_catalogue.pdf
    • https://cdn.shopify.com/s/files/1/0437/6326/9789/files/classroom_rules_poster.pdf
    • https://cdn.shopify.com/s/files/1/0437/3826/7809/files/mozuforuwuxos.pdf
    • https://cdn.shopify.com/s/files/1/0438/1350/3133/files/83322227702.pdf
    • https://cdn.shopify.com/s/files/1/0434/9945/4628/files/energias_renovables_introduccion.pdf
    • https://cdn.shopify.com/s/files/1/0433/2378/5370/files/html_to_javascript_jsfiddle.pdf
    • https://cdn.shopify.com/s/files/1/0432/2027/1259/files/wexezur.pdf
    • https://cdn.shopify.com/s/files/1/0430/1219/4463/files/cambridge_checkpoint_math_book_1_answers.pdf
    • https://cdn.shopify.com/s/files/1/0438/4332/2016/files/bibubegivelidimejijax.pdf
    • https://cdn.shopify.com/s/files/1/0438/2729/8461/files/lixozo.pdf
    • https://cdn.shopify.com/s/files/1/0459/7334/0320/files/akc_reunite_enrollment_transfer_form.pdf
    • https://cdn.shopify.com/s/files/1/0434/8654/4022/files/fluoroscopic_guided_hip_injection_cpt_code.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_off00005d99.bin
44e0b225b09c5ba5484d67b576a125e7c26e48c8cfc50df360fd9dab7dccbfc8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D99 5576 bytes
font_01_sfnt_off000070a2.bin
6e1ad1ca5ca07417d645e9cf58a6e86e606b3ddad7a0cedf20002e4e8aeb8007		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A2 10364 bytes

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