Malicious PDF — malware analysis report

Static analysis result for SHA-256 a41689c3ea000951…

MALICIOUS

PDF

65.0 KB Created: 2020-08-11 13:41:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0ff06dee20327110e2f04f8036fe3629 SHA-1: 357fbd4a7d80e65239b6c50f4fdfedfe90bd2a7c SHA-256: a41689c3ea000951613ba9e6ac2473194cb3d73c2706d028c54ef9329a577eed
130 Risk Score

Malware Insights

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

The PDF contains numerous links, including a critical redirector link to 'ttraff.com', indicating a malicious redirection attempt. The presence of a 'download button' heuristic further supports a lure-based attack pattern. While the document body is heavily obfuscated, the embedded URL and the PDF_MALICIOUS_REDIRECTOR_LINK heuristic strongly suggest the intent is to lead the user to malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wb?keyword=periyar%20books%20in%20tamil%20pdf%20free%20download
    • http://files.psusdscience.com/uploads/1/3/1/3/131384771/73359.pdf
    • http://xadadifu.theolivercurdtrust.org/uploads/1/3/1/1/131164250/805824.pdf
    • http://files.doubledatepacking.com/uploads/1/3/1/1/131163684/lobal_sepap_bexim_laxenomawezimev.pdf
    • https://cdn.shopify.com/s/files/1/0434/4892/6364/files/benowowuma.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kixekitigatozodevejale.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/pupugijujosulalebajul.pdf
    • https://cdn.shopify.com/s/files/1/0430/9352/4637/files/xijus.pdf
    • https://cdn.shopify.com/s/files/1/0433/3066/6651/files/adobe_photoshop_cs5_tutorials.pdf
    • https://cdn.shopify.com/s/files/1/0429/2050/9596/files/jewuwunadufigomil.pdf
    • https://cdn.shopify.com/s/files/1/0439/2806/0059/files/57071012746.pdf
    • https://cdn.shopify.com/s/files/1/0431/8930/5506/files/moravia_il_disprezzo.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/this_boy_s_life_book.pdf
    • https://cdn.shopify.com/s/files/1/0437/3915/2535/files/legifig.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/51994241049.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_off0000bdc5.bin
3c103626e23bc88b4d021c5e0d97c417c16e87b4a61b94ac015d88ec4afa3d3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBDC5 5588 bytes
font_01_sfnt_off0000d0b9.bin
dd8408992946cc34d120563f8c3c6555f4318dd49ecd6a95f3d407626f042813		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B9 11308 bytes

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