Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a57624b76ea97b4…

MALICIOUS

PDF

41.1 KB Created: 2020-07-25 23:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b669d59ab1c590b58fa97008fb6c9cfa SHA-1: 6077bf77a6474ab8af75d9b71da750f7def3c3f5 SHA-256: 4a57624b76ea97b42846ea930476b8edc9c1f83755dae40a6b6a918c95fe4d88
128 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link and a mass external PDF link farm, indicating a phishing or scam attempt. The presence of a 'download button' heuristic further supports the lure. The document body is heavily obfuscated and unreadable, but the heuristics clearly point to a malicious redirector and a link farm designed to drive traffic.

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.cc/pify?keyword=arial+condensed+font+family+free
    • http://files.heritagepreschoolmason.com/uploads/1/3/1/4/131483197/d86996f62831.pdf
    • http://files.trashstress.com/uploads/1/3/2/6/132681207/runakawobusidoveruxa.pdf
    • http://files.sig22neuroeducation.com/uploads/1/3/1/4/131482915/jogabujop.pdf
    • http://files.sig22neuroeducation.com/uploads/1/3/1/4/131482
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/witekujapuzusogunuseziz.pdf
    • https://cdn.shopify.com/s/files/1/0432/2800/4507/files/wajeditojoz.pdf
    • https://cdn.shopify.com/s/files/1/0437/6179/5230/files/7656664205.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/ropevoredugebu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/12584167006.pdf
    • https://cdn.shopify.com/s/files/1/0435/1626/4616/files/nazatupirubevokosewik.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/24762996451.pdf
    • https://cdn.shopify.com/s/files/1/0429/9925/1093/files/82388759180.pdf
    • https://cdn.shopify.com/s/files/1/0436/2862/6080/files/90523567269.pdf
    • https://cdn.shopify.com/s/files/1/0436/0205/1235/files/55888234826.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/gudizukidegelorepev.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_off00006292.bin
11834871e479fb3516a3a1dbf5b837b31edc5108d5e725d076c2db7a57e02686		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6292 5044 bytes
font_01_sfnt_off00007399.bin
da35ebf55ca37261996c3df5a7b1af0945bc21ad61ed2e00a5f1b4421084e157		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7399 10472 bytes

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