Malicious PDF — malware analysis report

Static analysis result for SHA-256 39206b58d44ccbd4…

MALICIOUS

PDF

50.9 KB Created: 2020-08-03 15:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b2a4871a736134405e73f5ce8ab76616 SHA-1: 6b68eff4adc590718aa88b6cdc577e1b0e61dbcf SHA-256: 39206b58d44ccbd4abf31000ca207d9fa7b5ca4043ac8c67a3a3acb309f7b98b
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to a URL that promises Bitcoin mining information. This URL is likely part of a phishing or scam campaign. The document body, though heavily obfuscated, contains the same URL, reinforcing the malicious intent. The presence of numerous external PDF links, many hosted on Shopify, suggests an attempt to create a link farm for SEO manipulation or to distribute malicious content.

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.cc/pify?keyword=bitcoin+mining+algorithm+pdf
    • http://files.mrsfedele.com/uploads/1/3/1/4/131406274/minixodin_zenumal.pdf
    • http://gojexo.hornsbyptsa.org/uploads/1/3/1/6/131606260/zezevu.pdf
    • http://files.twinriverwholesale.com/uploads/1/3/1/3/131380625/66fd5c32f9a.pdf
    • http://files.mrsfedele.com/uploads/1/3/1/4/1
    • https://cdn.shopify.com/s/files/1/0432/8197/3416/files/53363887344.pdf
    • https://cdn.shopify.com/s/files/1/0431/1541/3661/files/pofal.pdf
    • https://cdn.shopify.com/s/files/1/0430/4103/0293/files/68772315301.pdf
    • https://cdn.shopify.com/s/files/1/0431/7950/7880/files/66332854962.pdf
    • https://cdn.shopify.com/s/files/1/0438/9735/6443/files/neletelojakakolasolegu.pdf
    • https://cdn.shopify.com/s/files/1/0433/1080/9256/files/difference_between_educational_and_vocational_guidance.pdf
    • https://cdn.shopify.com/s/files/1/0428/6860/5095/files/11839465059.pdf
    • https://cdn.shopify.com/s/files/1/0438/0921/0529/files/john_deere_4710.pdf
    • https://cdn.shopify.com/s/files/1/0440/9557/0072/files/namidodelije.pdf
    • https://cdn.shopify.com/s/files/1/0434/5652/8537/files/zojumiwuduvimatosorivab.pdf
    • https://cdn.shopify.com/s/files/1/0435/5633/9861/files/95_nissan_pathfinder.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4436/files/46169501899.pdf
    • https://cdn.shopify.com/s/files/1/0427/5834/0774/files/447463329.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007311.bin
3a489754e1ac95a45829932c32a1f9f64f2527b540118ffa8a1788ddd69ff733
pdf-font-stream PDF embedded font (sfnt) at offset 0x7311 5440 bytes
font_01_sfnt_off00008564.bin
2a2fb5aba80bb0ac71086123d056260293a6ee714b7dd99c0334a211c78ff207
pdf-font-stream PDF embedded font (sfnt) at offset 0x8564 10444 bytes
font_02_sfnt_off0000a940.bin
9fce2e558c7eba93e9b4ba87b790c422cf9490aab73fe875614431ac3e7f116a
pdf-font-stream PDF embedded font (sfnt) at offset 0xA940 16060 bytes