Malicious PDF — malware analysis report

Static analysis result for SHA-256 56d9382ffd911b09…

MALICIOUS

PDF

40.9 KB Created: 2020-08-31 02:21:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 87705268fccbf542848f11b667a8a990 SHA-1: 55dfed0d1d108062a09c3c635c78e65ec36ae506 SHA-256: 56d9382ffd911b09429649426a8630551e3fab938da4fa5adca527453767b117
128 Risk Score

Malware Insights

MITRE ATT&CK
T1200 Hardware Add-in T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains a link that redirects to a known malicious domain, disguised as a download for 'Left 4 dead 2 for android'. The heuristic firings indicate a malicious redirector link and a PDF link farm, suggesting a phishing or scam attempt. The presence of a 'download button' lure further supports this. No scripts were extracted from this sample.

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/wix?keyword=left+4+dead+2+for+android+free+downl
    • https://static.usrfiles.com/ugd/fef806_734592d0a9224ee7969c2ce1615959d3.pdf
    • https://static.usrfiles.com/ugd/3cb679_9a8fde5b37f94e3a8c20f490636302ed.pdf
    • https://static.usrfiles.com/ugd/3b47cb_c6a7c1e15e8b4291baae3269b6a96de1.pdf
    • https://static.usrfiles.com/ugd/9ff9b8_450af5f6574441ff8ec8eb2a6c58b998.pdf
    • https://cdn.shopify.com/s/files/1/0435/0800/7072/files/wasiwemiko.pdf
    • https://cdn.shopify.com/s/files/1/0428/3393/6547/files/38450524079.pdf
    • https://cdn.shopify.com/s/files/1/0435/9005/8152/files/53597219247.pdf
    • https://cdn.shopify.com/s/files/1/0437/2935/4903/files/5001891270.pdf
    • https://cdn.shopify.com/s/files/1/0440/5736/2597/files/math_behind_machine_learning.pdf
    • https://cdn.shopify.com/s/files/1/0437/2122/8442/files/google_earth_7._1._2._2041_download.pdf
    • https://cdn.shopify.com/s/files/1/0437/1618/2166/files/sadesolef.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f64970ddd3842689cc60dc51f85cb25.pdf
    • https://static.usrfiles.com/ugd/b8c837_fbd1a2af1ae94595991240fcbf6f8176.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/
    • https://static.usrfiles.com/ugd/b8c837_6f6

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061fb.bin
68f1bfe63a1eb90fd0a4f20fa419f5e1e79cfa9d2ddbf0879451325530948d44		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61FB 4976 bytes
font_01_sfnt_off00007316.bin
501565891aac79c5a1a79aa6b5586c420e03130267e8a603d72eb5fc70710de0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 10424 bytes

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