Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d3be7ea31506ccd…

MALICIOUS

PDF

45.2 KB Created: 2020-08-20 07:06:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6885b95f8152b735485172bae6080c41 SHA-1: 38affea72dea2dc59d29ddaf1c665daf28f55e80 SHA-256: 1d3be7ea31506ccd7542c62baa6530fffbe7361b964273241b7ff3768dee2dd0
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.com/pify?keyword=friend+like+me+sheet+music+pdf+free'. The document body, though partially corrupted, contains text related to sheet music and the malicious URL. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many of which are benign Shopify links, but the primary malicious URL is the critical finding. No scripts were extracted from this sample.

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/pify?keyword=friend+like+me+sheet+music+pdf+free
    • http://files.cbustherapy.com/uploads/1/3/1/4/131453645/retevoruladex-bupifa-xizogifajupiwuj-kaxima.pdf
    • http://limavered.somersetrehab.com/uploads/1/3/2/8/132815213/1215631.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/71419102660.pdf
    • https://cdn.shopify.com/s/files/1/0435/2484/9815/files/chatterbox_app_android.pdf
    • https://cdn.shopify.com/s/files/1/0432/6467/1906/files/git_diff_file.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8167/files/22056937530.pdf
    • https://cdn.shopify.com/s/files/1/0437/1172/5723/files/43528823222.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4179/files/service_agreement_template_singapore.pdf
    • https://cdn.shopify.com/s/files/1/0433/2974/9145/files/29972703174.pdf
    • https://cdn.shopify.com/s/files/1/0435/6125/5073/files/74132815115.pdf
    • https://cdn.shopify.com/s/files/1/0437/4842/5889/files/bollywood_movies_2015_free.pdf
    • https://cdn.shopify.com/s/files/1/0439/0024/0024/files/art_of_worldly_wisdom_baltasar_gracian.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/kifafitomefisatazid.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_off0000741b.bin
317733fd1b212a1bf8cef855e0e762a6409a0d7ee8a90f8e48e72204d34094e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741B 5204 bytes
font_01_sfnt_off000085a1.bin
c8a8fbee204569beb36a6337e36722bbc676ee965a278a8f67241a02894a1ba0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85A1 10120 bytes

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