Malicious PDF — malware analysis report

Static analysis result for SHA-256 76a2aa6c448bb333…

MALICIOUS

PDF

40.2 KB Created: 2020-08-21 21:19:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 746d75e1f32dc9272482faddd58315dd SHA-1: a8e80d350ad912ec3fbbf677e5dd7b329d6f661e SHA-256: 76a2aa6c448bb333c2d0cc5f739d91c8fa830678cf9d87ae2952f44bf38d629b
120 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating a link to a known malicious redirector. The document body, though partially corrupted, contains text related to calculating percentages and references the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to distribute the malicious redirector.

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=formule+pour+calculer+un+pourcentage+de+diminution
    • http://files.kennedycustomprops.com/uploads/1/3/1/1/131163833/gojotupupeniri.pdf
    • https://cdn.shopify.com/s/files/1/0433/5910/9279/files/mekimekonikemijedu.pdf
    • https://cdn.shopify.com/s/files/1/0437/7473/8593/files/caliper_test_questions.pdf
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/81685894105.pdf
    • https://cdn.shopify.com/s/files/1/0431/3353/4369/files/stephen_king_short_stories_online.pdf
    • https://cdn.shopify.com/s/files/1/0431/4487/2085/files/android_transfer_app.pdf
    • https://cdn.shopify.com/s/files/1/0436/8600/2838/files/json_lint_formatter_online.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9219/files/dental_assistant_study_guide.pdf
    • https://cdn.shopify.com/s/files/1/0433/8545/4757/files/wibopukul.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/ketejubajiziborodupome.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58143530911.pdf
    • https://cdn.shopify.com/s/files/1/0439/2206/3515/files/ibm_vision_statements.pdf
    • https://cdn.shopify.com/s/files/1/0453/5307/4843/files/autobiography_poem.pdf
    • https://cdn.shopify.com/s/files/1/0435/7105/2703/files/ey_2019_tax_guide.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_off00005ba5.bin
e0369e93cd36d60e127b57691e857003215a0a3594b77d31b3bef1f7e8821b6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BA5 5172 bytes
font_01_sfnt_off00006d21.bin
cd30c5e43a5c03920df437d345c188adb69d6366204ef56c6b7fefe5173a6b30		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D21 11640 bytes

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