Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff03944ae8ef7a7c…

MALICIOUS

PDF

117.6 KB Created: 2020-08-09 05:58:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 507468c33abc943745bec1659dd84b0f SHA-1: b539dfe4ab12ef7201927b00e0d3add49da44a12 SHA-256: ff03944ae8ef7a7ca0c9eac56ea031ca5efe046f4a4c7cf2f54d3bcaf11e0aa3
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, forming a link farm, with one URL pointing to known malicious redirector infrastructure. The primary malicious URL is https://ttraff.com/pify?keyword=catequesis+de+confirmacion+para+ni%25C3%25B1os+pdf. The document body appears to be malformed or corrupted, but the presence of numerous links to PDFs hosted on Shopify, combined with the malicious redirector, suggests a campaign focused on SEO manipulation or distributing further 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.com/pify?keyword=catequesis+de+confirmacion+para+ni%25C3%25B1os+pdf
    • http://files.jonathanposthuma.com/uploads/1/3/1/3/131379740/2f8e26d0e2bac.pdf
    • http://files.mathgenerations.com/uploads/1/3/0/7/130739830/pijotewe.pdf
    • http://files.keonilearning.com/uploads/1/3/1/3/131379396/0a8bb18.pdf
    • http://xapatik.antioch-vb.com/uploads/1/3/2/7/132710780/661298a32.pdf
    • http://files.bateshetzel.com/uploads/1/3/1/6/131606284/bikogivubi-xagutob.pdf
    • https://cdn.shopify.com/s/files/1/0433/3089/6026/files/pepetupuwiludenozuso.pdf
    • https://cdn.shopify.com/s/files/1/0430/5354/7677/files/literature_review_on_chrysophyllum_albidum.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3557/files/19688281293.pdf
    • https://cdn.shopify.com/s/files/1/0433/1352/8987/files/jemaremusevovunusarifafu.pdf
    • https://cdn.shopify.com/s/files/1/0433/4059/5352/files/atulya_bharat_by_rajni_vyas_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/1148/0472/files/airmen_mock_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/9049/4119/files/flask_contact_form.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6636/files/relufegabavizinowujag.pdf
    • https://cdn.shopify.com/s/files/1/0431/8016/3227/files/gufaruser.pdf
    • https://cdn.shopify.com/s/files/1/0432/0985/1048/files/luxunizalojuwezamanula.pdf
    • https://cdn.shopify.com/s/files/1/0428/7476/5475/files/vinunanuf.pdf
    • https://cdn.shopify.com/s/files/1/0440/3098/4357/files/megivilikenofebomeluletiw.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/how_many_seasons_of_adventure_time.pdf
    • https://cdn.shopify.com/s/files/1/0437/9928/1821/files/quitclaim_deed_illinois.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_off00017101.bin
97a8715c643a7c9decc028a885ab6da66db92788f4ccf07fc6d6408be846772b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17101 5512 bytes
font_01_sfnt_off0001835f.bin
5b08812374ca6be2966e704fd99a57b411e140568cc9e71c6f5ae3b71ce0a36f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1835F 17948 bytes
font_02_sfnt_off0001b838.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B838 4324 bytes

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