Malicious PDF — malware analysis report

Static analysis result for SHA-256 5084d22d6c93c516…

MALICIOUS

PDF

43.3 KB Created: 2020-08-03 11:09:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1cd38c4ca6000bdcd78a78d0ad4704e SHA-1: 87a9f6662161d46d3f94c077d873894fdd910b41 SHA-256: 5084d22d6c93c5166a9c74c8a15864902bb0f1f6a141736eb4416e079310746f
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 embedded external links, many of which lead to a redirector service. The document body contains garbled text but also includes the same redirector URL and several Shopify-hosted PDF links. This suggests a link farm or SEO spam campaign, potentially leading to phishing or malware distribution.

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.ru/pify?keyword=william+alexander+painter
    • http://files.lappeusfuneralhome.com/uploads/1/3/1/6/131607103/likozodenote_newaber.pdf
    • http://files.stephengreiman.com/uploads/1/3/2/7/132740620/lotepil-rokom.pdf
    • http://files.camppepper.com/uploads/1/3/2/3/132302913/1217584.pdf
    • https://cdn.shopify.com/s/files/1/0432/9770/2046/files/62696292279.pdf
    • https://cdn.shopify.com/s/files/1/0428/0510/0707/files/11833285923.pdf
    • https://cdn.shopify.com/s/files/1/0435/5024/5028/files/leruzumijosegijomim.pdf
    • https://cdn.shopify.com/s/files/1/0434/9581/7382/files/94533828956.pdf
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/nolem.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/vemoru.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/ti_83_manuals.pdf
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/woxejum.pdf
    • https://cdn.shopify.com/s/files/1/0433/1651/0873/files/78376493081.pdf
    • https://cdn.shopify.com/s/files/1/0430/8038/4674/files/sizinufogumefelul.pdf
    • https://cdn.shopify.com/s/files/1/0431/3038/8642/files/25669315557.pdf
    • https://cdn.shopify.com/s/files/1/0427/8904/4383/files/57399606062.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_off00006c09.bin
69cbfe174b19ff041d036efe0eb2041716fa0340e43446b168b9e058e2907852		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C09 5008 bytes
font_01_sfnt_off00007d09.bin
08a164a42ab4baee13e6ff7dd2aa393976a765590e50feb48b03db611816d338		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D09 10392 bytes

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