Malicious PDF — malware analysis report

Static analysis result for SHA-256 cda640f04b9231aa…

MALICIOUS

PDF

64.3 KB Created: 2020-08-04 10:55:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e1474687ea50ec2beed697e56577b7b SHA-1: f8628106534caf637b6164ffce95086dc2331164 SHA-256: cda640f04b9231aacd4665a4729557b9901039ef70411c27247c08a4b2d81ac7
120 Risk Score

Malware Insights

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

The PDF file contains numerous links to external resources, a technique often used for SEO poisoning or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'ttraff.cc', which is disguised with a plausible keyword related to biochemistry. The document body is heavily obfuscated and contains the malicious URL, confirming the redirection attempt. No scripts were extracted from this sample.

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=buffers+in+biochemistry+pdf
    • http://files.cnmiu14nt.org/uploads/1/3/2/3/132303009/fitupi_zalejotaguf_wepixo_memavoxutozil.pdf
    • http://files.vibrantfarms.com/uploads/1/3/1/4/131437676/638a21c550d73.pdf
    • http://files.angelicharpacademy.com/uploads/1/3/1/4/131483138/narikubi.pdf
    • http://files.benedictegrima.com/uploads/1/3/2/6/132681359/vopukavotepi_guzab_zadojotupozu.pdf
    • http://files.andysmoles.com/uploads/1/3/0/7/130739037/1535329.pdf
    • https://cdn.shopify.com/s/files/1/0432/3858/8584/files/extens_c3_a3o_chrome_aliexpress.pdf
    • https://cdn.shopify.com/s/files/1/0431/3989/1357/files/petsafe_wireless_collar_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/5203/9328/files/11826586465.pdf
    • https://cdn.shopify.com/s/files/1/0433/7768/8743/files/14482909753.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/diniwisetutapotokiponi.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/97458960027.pdf
    • https://cdn.shopify.com/s/files/1/0444/0922/5382/files/business_model_generation_by_alexander_osterwalder.pdf
    • https://cdn.shopify.com/s/files/1/0431/0879/4530/files/43408577419.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/88737424068.pdf
    • https://cdn.shopify.com/s/files/1/0430/5318/7223/files/mudurufalijugebifoxef.pdf
    • https://cdn.shopify.com/s/files/1/0428/4815/7859/files/matlab_for_dummies.pdf
    • https://cdn.shopify.com/s/files/1/0433/9197/5580/files/jekimebi.pdf
    • https://cdn.shopify.com/s/files/1/0433/7264/2460/files/ceiling_types.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a8e3.bin
7bdb7973dff2dee2a128211f9e88c60f4eb18c6cdc4a1905e033808d9742865d
pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E3 5444 bytes
font_01_sfnt_off0000bb4b.bin
a4e47181071c2a7576f49ce2d643ef73930fd8902255a467485dda12f120373c
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB4B 10272 bytes
font_02_sfnt_off0000debc.bin
64e13322576ebe4b9a20b8efdba1cb2c8bc01163a7c4e1ba1f667a2d7cf8e6df
pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 16116 bytes