Malicious PDF — malware analysis report

Static analysis result for SHA-256 edc498e9f9efec5b…

MALICIOUS

PDF

41.1 KB Created: 2020-09-03 11:50:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 16ef1493bbcb953396400c5dbf833c07 SHA-1: 5f39d224c103f9da8605026a8f2e411dec5b8c80 SHA-256: edc498e9f9efec5b14e6e8cc4f91d76f39c90edc446ecab000578b95bc67cd67
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with one prominent link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL and several other benign-looking URLs hosted on Shopify. The primary malicious intent appears to be redirecting the user to the ttraff.link domain, likely for further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.link/wix?keyword=hyperdimension+neptunia+re+birth+2+trophy+guide
    • https://cdn.shopify.com/s/files/1/0430/7173/3917/files/falirul.pdf
    • https://cdn.shopify.com/s/files/1/0436/9154/0634/files/pekijajadana.pdf
    • https://cdn.shopify.com/s/files/1/0430/3483/7149/files/remafataxikoxeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/2721/0144/files/56710586989.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/fagolab.pdf
    • https://cdn.shopify.com/s/files/1/0440/7079/7462/files/chick-_fil-_a_chicken_salad_nutrition_information.pdf
    • https://cdn.shopify.com/s/files/1/0433/3309/1480/files/55785290156.pdf
    • https://static.usrfiles.com/ugd/de9003_ce345f4590c240208abb4ee004c2fbf5.pdf
    • https://static.usrfiles.com/ugd/c1108c_9faecbdc0dac47fd838289b2cededb98.pdf
    • https://static.usrfiles.com/ugd/38bf1f_dc24f6c75e0f4e17b065b6e13cec6e83.pdf
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/32102083324.pdf
    • https://cdn.shopify.com/s/files/1/0439/1036/5339/files/misfits_saturday_night.pdf
    • https://cdn.shopify.com/s/files/1/0432/0670/5312/files/sufetujav.pdf
    • https://cdn.shopify.com/s/files/1/0437/9607/0560/files/guinness_nigeria_plc_annual_report_2018.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_off000060e1.bin
0f18d9beaee11737c749c929d7db9c97180711f23c5a64f6c219ab6aa50204fe
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 5676 bytes
font_01_sfnt_off00007405.bin
bbf3ff0b15d10dfcbeedd5a8d9f1afcaed36341adffdbcc29ed8a32990732dee
pdf-font-stream PDF embedded font (sfnt) at offset 0x7405 10372 bytes