Malicious PDF — malware analysis report

Static analysis result for SHA-256 84fd3c978eff98cd…

MALICIOUS

PDF

58.3 KB Created: 2020-08-08 07:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f251fca36df64637b251a60a6f9bbe5 SHA-1: e6ba68854276b1c060ecd7cb813dae591242a13e SHA-256: 84fd3c978eff98cda2ec793acf56ba2f457466f80600799c4a41f217ad7e18f3
120 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The primary malicious URL identified is https://ttraff.cc/pify?keyword=the+story+of+an+hour+free+pdf. This suggests the document's purpose is to redirect users to potentially harmful content, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure and embedded links are sufficient for this assessment.

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=the+story+of+an+hour+free+pdf
    • http://zawarit.aya-technologies.com/uploads/1/3/0/7/130739616/buxukuzit_tubugewave_rijiw.pdf
    • http://files.red2green.org/uploads/1/3/2/6/132695273/tudanibaruweker.pdf
    • http://files.risingravenband.com/uploads/1/3/1/3/131384018/buvab.pdf
    • http://files.mtbreizen.nl/uploads/1/3/1/3/131383934/gifuza.pdf
    • https://cdn.shopify.com/s/files/1/0435/6957/8147/files/advanced_articles_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/82328062887.pdf
    • https://cdn.shopify.com/s/files/1/0431/3907/2161/files/85704528457.pdf
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/loniw.pdf
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/50375053130.pdf
    • https://cdn.shopify.com/s/files/1/0427/7652/7014/files/frost_relic_risk_of_rain_2.pdf
    • https://cdn.shopify.com/s/files/1/0438/6013/2005/files/gewume.pdf
    • https://cdn.shopify.com/s/files/1/0433/3069/9414/files/11042518736.pdf
    • https://cdn.shopify.com/s/files/1/0431/3510/7233/files/writing_ielts_band_9.pdf
    • https://cdn.shopify.com/s/files/1/0430/0396/9689/files/pibokipegixabetepakemepab.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2629/files/bafepajadutotowot.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/oregon_trail_emulator.pdf
    • https://cdn.shopify.com/s/files/1/0431/9212/3560/files/dotakoregufokudosoz.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_off0000a207.bin
367807a9afdf725b968cc0e29401c1c0f64db7fcccb0a1e2ef9054d059dd8522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA207 5148 bytes
font_01_sfnt_off0000b38c.bin
f4c0b1dee8074b649ee043686c9284c7c9f5b5480f1a71b068e50eea0fbd73e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB38C 12584 bytes

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