Malicious PDF — malware analysis report

Static analysis result for SHA-256 db36082983e17166…

MALICIOUS

PDF

43.5 KB Created: 2020-07-27 18:51:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fe96efcb119c044b4420bfd29f45cba SHA-1: 3977ce53d047b2b5abfa4126e2242c01dd4b2288 SHA-256: db36082983e171665ac89924a41b0de681d35f314ad664a306aa3969c5fa7bdc
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it's a malicious redirector link, pointing to 'ttraff.com'. Additionally, another critical heuristic identified it as a PDF SEO link farm, containing numerous external links, with 'cdn.shopify.com' being a dominant host. The embedded document body, though heavily obfuscated, contains text related to 'php tutorials point pdf download', reinforcing the lure.

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/wb?keyword=php%20tutorials%20point%20pdf%20download
    • http://files.richardmarman.net/uploads/1/3/0/7/130775231/rabakumofog.pdf
    • http://files.treehousehashomes.com/uploads/1/3/0/7/130739780/38f88c6b4b.pdf
    • http://files.krispykleanautospa.com/uploads/1/3/2/6/132681772/3c2763.pdf
    • http://files.ror-n.org/uploads/1/3/0/8/130814926/4e109f.pdf
    • http://files.richardmarman.net/uploads/1/3/0/7/130775231/rabaku
    • https://cdn.shopify.com/s/files/1/0428/8036/8796/files/baravosuf.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/putin.pdf
    • https://cdn.shopify.com/s/files/1/0434/6232/8472/files/vopuvipivefumox.pdf
    • https://cdn.shopify.com/s/files/1/0432/9707/9460/files/93721771842.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/ganopupamenifutip.pdf
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/67091645251.pdf
    • https://cdn.shopify.com/s/files/1/0427/6341/9815/files/befudajegufapexa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5276/files/24367959253.pdf
    • https://cdn.shopify.com/s/files/1/0432/5575/9006/files/86169372786.pdf
    • https://cdn.shopify.com/s/files/1/0429/7257/7946/files/21983505337.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.pdf
    • https://cdn.shopify.com/s/files/1/0433/2004/9822/files/nizebifar.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_off00006cdc.bin
6f2070f93617b1c2b3fed79b9c06b3cd9a892f85e0d6a709e36ed9bded0cd5e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CDC 4984 bytes
font_01_sfnt_off00007dc0.bin
f42b9565c37a1917257aba31cff7d3c0cfddd4d9976f1468767f81427dd6d9af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DC0 10252 bytes

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