Malicious PDF — malware analysis report

Static analysis result for SHA-256 a829f8c37f5159e6…

MALICIOUS

PDF

44.3 KB Created: 2020-08-11 00:13:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8b45400fb15ba6525bd402a53ea5fcf9 SHA-1: 73101eb5a2c070c96956127feb5784c80707aaad SHA-256: a829f8c37f5159e602101a27cf8709d639e0b24eef93003872a80ca5193914e2
120 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, which is also present in the document body. The document also exhibits characteristics of a link farm, with numerous external links, many pointing to Shopify domains. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or phishing pages.

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.cc/pify?keyword=ophthalmology+books+pdf+free
    • http://files.hilltoppreschoolrva.com/uploads/1/3/1/3/131383575/vurududopus.pdf
    • http://files.zstreetbandorlando.com/uploads/1/3/1/3/131379276/f9b888af.pdf
    • http://files.sarahkramerharrison.net/uploads/1/3/0/8/130814205/gejader-givajiromuw.pdf
    • http://jogorog.bringitonline.in/uploads/1/3/0/7/130740069/40ba9074ca.pdf
    • https://cdn.shopify.com/s/files/1/0437/8791/1319/files/braunwald_valvular_heart_disease.pdf
    • https://cdn.shopify.com/s/files/1/0437/6572/7384/files/fodesuliluvojiz.pdf
    • https://cdn.shopify.com/s/files/1/0434/3303/3877/files/sejifoxotenimo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/19985943067.pdf
    • https://cdn.shopify.com/s/files/1/0429/0953/2316/files/xufujerunoxedavire.pdf
    • https://cdn.shopify.com/s/files/1/0433/8165/3655/files/doxupe.pdf
    • https://cdn.shopify.com/s/files/1/0433/7578/8184/files/55292225529.pdf
    • https://cdn.shopify.com/s/files/1/0436/7794/1913/files/kuduzupugimam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2986/4343/files/27046855725.pdf
    • https://cdn.shopify.com/s/files/1/0441/2823/9768/files/electronic_devices_for_analog_signal_processing.pdf
    • https://cdn.shopify.com/s/files/1/0432/7096/3350/files/webonu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45484104345.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_off00006e13.bin
8b699b944e0c661b3cf0f1c1962f9bf09b5e5572e3ba45871757baf8504dd898		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E13 5788 bytes
font_01_sfnt_off000081a6.bin
0ca6b38ce1c32ccdd6809045e7938b43f64698f12b23ee58f6dccdf60f377cbe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81A6 10096 bytes

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