Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced41a41a1c2f014…

MALICIOUS

PDF

67.1 KB Created: 2020-08-25 05:06:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958c0278f40b0818d4248e43b2a05512 SHA-1: 1f03748a86415fd0523596b4354343e5972a5fc1 SHA-256: ced41a41a1c2f014e5e3034dcf8867678b2d73f3c7fa6dad0a7dca239576be3b
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'Factors affecting chemical equilibrium worksheet answers' and the malicious URL, suggesting a lure to trick users into clicking the malicious link. The presence of numerous links, including the malicious one, indicates a link farm or redirection strategy to obscure the final malicious destination.

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=factors+affecting+chemical+equilibrium+worksheet+answers
    • http://files.onegirlmanyideas.com/uploads/1/3/1/3/131383727/5363834.pdf
    • http://files.inthelaughterlocker.com/uploads/1/3/2/3/132302732/9162444.pdf
    • https://cdn.shopify.com/s/files/1/0447/7688/2327/files/retinoblastoma_elsevier.pdf
    • https://cdn.shopify.com/s/files/1/0431/6587/6379/files/54816134147.pdf
    • https://cdn.shopify.com/s/files/1/0465/3236/2390/files/sejobejusatowomotobuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/pexiluzabas.pdf
    • https://cdn.shopify.com/s/files/1/0429/8270/3257/files/acid_rain_chemistry_project.pdf
    • https://cdn.shopify.com/s/files/1/0437/8286/5047/files/28812468344.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gujogu.pdf
    • https://cdn.shopify.com/s/files/1/0432/8056/4392/files/jixedetate.pdf
    • https://cdn.shopify.com/s/files/1/0440/6303/1448/files/borders_railway_map.pdf
    • https://cdn.shopify.com/s/files/1/0434/0065/9100/files/63587102340.pdf
    • https://cdn.shopify.com/s/files/1/0432/2679/2098/files/technical_chart_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/32396474887.pdf
    • https://cdn.shopify.com/s/files/1/0429/2182/0313/files/strategic_alliance_agreement.pdf
    • https://cdn.shopify.com/s/files/1/0435/1967/2472/files/mopegigisatifurapabok.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_off0000bf6a.bin
ebb40de32c04dc5ca9c5c17207ef05fd5feaa8ad229da4c6f0eef311ee3a5545		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF6A 5672 bytes
font_01_sfnt_off0000d29c.bin
7f33d1a47dce59795a0536f7591c27c3a7e3833dc8cc00a098a8c8e6a1a0bcca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD29C 13864 bytes

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