Malicious PDF — malware analysis report

Static analysis result for SHA-256 b85f820653a74a6c…

MALICIOUS

PDF

44.8 KB Created: 2020-08-03 20:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 75e8123fb67caf8a32b88530a974c68d SHA-1: 03563746c9c3559672f369a4dc5ca742b58b5a3e SHA-256: b85f820653a74a6c58f286343ec845df6d11e74722b4312eacb2391a6a0b630c
120 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as legitimate content (crochet patterns) but redirects to a malicious URL (https://ttraff.cc/pify?keyword=beginner+crochet+patterns+pdf). This indicates a phishing or redirection attack. The PDF structure and embedded links suggest a social engineering attempt to drive traffic to malicious infrastructure.

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=beginner+crochet+patterns+pdf
    • http://files.thehistorytrail.net/uploads/1/3/1/1/131163666/sijogoxon.pdf
    • http://files.katherineoday.com/uploads/1/3/2/7/132710779/cfe89a1aa9115eb.pdf
    • http://files.rexmissions.com/uploads/1/3/1/4/131438464/jidaraduxomoledodin.pdf
    • http://files.nicksforzamclaren.com/uploads/1/3/1/4/131438190/mafimebe.pdf
    • https://cdn.shopify.com/s/files/1/0432/7853/2758/files/rixinixidepemijulaxo.pdf
    • https://cdn.shopify.com/s/files/1/0435/5555/3432/files/32949746638.pdf
    • https://cdn.shopify.com/s/files/1/0430/6717/9165/files/26135564195.pdf
    • https://cdn.shopify.com/s/files/1/0434/2821/6997/files/patam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3136/2725/files/45164620787.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/salesforce_crm_tutorial_for_beginners.pdf
    • https://cdn.shopify.com/s/files/1/0430/8012/2532/files/70249684914.pdf
    • https://cdn.shopify.com/s/files/1/0435/3887/4532/files/2568578486.pdf
    • https://cdn.shopify.com/s/files/1/0429/6045/3785/files/1883482777.pdf
    • https://cdn.shopify.com/s/files/1/0431/5768/4375/files/zumejejiwodopapo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/vibemegabixowosepabotabux.pdf
    • https://cdn.shopify.com/s/files/1/0436/6771/8309/files/24374115587.pdf
    • https://cdn.shopify.com/s/files/1/0433/4842/6920/files/function_of_rough_endoplasmic_reticulum.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_off00007170.bin
c576f52abfd4620c0d3cb2b59df7c65e3082c6034a9b8df2b8df1cc8fb61dcd7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7170 5432 bytes
font_01_sfnt_off000083ed.bin
1fb2a9956fb0f7f0927e1cbc8f48fefb31b0403f192b9106528341844f4efb74		 pdf-font-stream PDF embedded font (sfnt) at offset 0x83ED 9964 bytes

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