Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c7ca6073b663024…

MALICIOUS

PDF

44.3 KB Created: 2020-07-31 00:48:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63774eca1eaac114c65cb2fd0541dc78 SHA-1: f2bbe511760d3b301ca879ca4328fb52b5a057ba SHA-256: 6c7ca6073b663024b573f3c6cb12c8df3e137a3b42c8b5b3c85b0f8c00bb87ba
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO manipulation tactic. One prominent link directs to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=albeniz+cordoba+guitar+pdf
    • http://files.hncong.org/uploads/1/3/0/7/130739366/tilumi.pdf
    • http://files.dlake.net/uploads/1/3/1/4/131483445/xekav-bakinoxerexasak-vekatusufi.pdf
    • http://files.sistersvillageinc.org/uploads/1/3/0/7/130776368/sesemopo.pdf
    • http://files.harmonyinhogswamp.com/uploads/1/3/1/0/131070317/af87285d7cd0b3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/6326888367.pdf
    • https://cdn.shopify.com/s/files/1/0432/7938/4744/files/bowedifa.pdf
    • https://cdn.shopify.com/s/files/1/0435/1954/1416/files/9395757239.pdf
    • https://cdn.shopify.com/s/files/1/0433/7929/4358/files/84405392292.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/90296180399.pdf
    • https://cdn.shopify.com/s/files/1/0432/7358/4793/files/46620519409.pdf
    • https://cdn.shopify.com/s/files/1/0436/4160/2208/files/zopetaboxiropiwakafesewu.pdf
    • https://cdn.shopify.com/s/files/1/0434/0645/9032/files/65874554579.pdf
    • https://cdn.shopify.com/s/files/1/0430/8946/1410/files/8785445082.pdf
    • https://cdn.shopify.com/s/files/1/0431/7688/6431/files/rixuwamu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0644/3163/files/88713801548.pdf
    • https://cdn.shopify.com/s/files/1/0437/7378/8321/files/tikoxipudado.pdf
    • https://cdn.shopify.com/s/files/1/0432/0952/3355/files/nixetomuj.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006ef4.bin
e76882aa8341cb74a6c92eff117986758e2ffea0ead37ded00e4055475b9a0d3
pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF4 5204 bytes
font_01_sfnt_off000080b1.bin
1f18c071acb5a96505478cccc351559b0526ecefd7c85a8fe67bdf301fb6ddb0
pdf-font-stream PDF embedded font (sfnt) at offset 0x80B1 10192 bytes