Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1190099f30afcf1…

MALICIOUS

PDF

44.1 KB Created: 2020-09-01 02:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bbdb726226760c3796c94fb132c0d0b2 SHA-1: 32e0286d607cf5509b192cf5d232e31e4f6f1033 SHA-256: e1190099f30afcf15bf197eedde08f12a96fdeff16e08cc6ad178c96026b5dc8
150 Risk Score

Malware Insights

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

The PDF was flagged as malicious due to a high number of external links, characteristic of a link farm. One critical heuristic identified a link to a known malicious redirector, ttraff.cc, which is used to obscure the final destination. The document body contains a reference to this redirector URL, suggesting it's the primary lure. The presence of numerous benign-looking PDF links hosted on static.usrfiles.com and cdn.shopify.com indicates an attempt to blend malicious links with legitimate-looking ones.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/wix?keyword=divinity+original+sin+2+player+guide
    • https://static.usrfiles.com/ugd/32777b_2d13ce0ea4e14dc7ae9b4dff65c8566a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dc4e1d3c30f24c46a999aafbd0482c6e.pdf
    • https://static.usrfiles.com/ugd/9421c8_22d2167248b44904a481dc100dc828f0.pdf
    • https://static.usrfiles.com/ugd/df4650_73785fc9e7ed431698c500038e795c98.pdf
    • https://cdn.shopify.com/s/files/1/0431/5018/0503/files/wakaponomapokajorupopi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/cactus_mccoy_2_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0432/0041/3856/files/91975749448.pdf
    • https://cdn.shopify.com/s/files/1/0437/1690/3080/files/lenovo_legion_y520-_15ikbn_datasheet.pdf
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/53225459518.pdf
    • https://cdn.shopify.com/s/files/1/0439/1396/9816/files/metformin_extended_release_overdose.pdf
    • https://static.usrfiles.com/ugd/760101_956d3b67489d48ac8b0efffab793baed.pdf
    • https://static.usrfiles.com/ugd/ceb2e8_5de906b81fdb44569c8117990f1c295b.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_off00006dcc.bin
9e16b96259ab70a199707aa68608795b92bcd100bccd219c7a2e1280ccff24f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DCC 5420 bytes
font_01_sfnt_off0000805f.bin
614dd0a55ea995a53bcbcc315fa19e0605134c37c4c06a12b3c7ee6ee91f25d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x805F 10204 bytes

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