Malicious PDF — malware analysis report

Static analysis result for SHA-256 669cff6e63e4e731…

MALICIOUS

PDF

45.3 KB Created: 2020-08-01 10:45:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3e70203b3b00a663ebe4ebd803b3a784 SHA-1: af8b78f7b2c519a2b1436cfa0c11e14a9c3c0382 SHA-256: 669cff6e63e4e73173b5f7961a0356e3d144cb940866dd41797d63cb2e68f820
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one critical heuristic firing indicating it points to known malicious redirector infrastructure. The document body, though partially corrupted, suggests a lure related to 'Directv local channel guide'. The presence of numerous external PDF links, many hosted on Shopify, further supports the SEO link farm heuristic, indicating an attempt to distribute malicious content or phishing pages.

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.com/pify?keyword=directv+local+channel+guide
    • http://files.cahsafi.com/uploads/1/3/0/7/130776374/0c122c40089.pdf
    • http://files.missionviejoclassic.com/uploads/1/3/2/7/132741334/wuberug.pdf
    • http://files.drewryfarmsmaple.com/uploads/1/3/1/4/131407952/mepatubiwuder.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/5505/5002/files/kufaguxejab.pdf
    • https://cdn.shopify.com/s/files/1/0432/5713/5257/files/pibiwesupul.pdf
    • https://cdn.shopify.com/s/files/1/0440/1207/7206/files/61726556303.pdf
    • https://cdn.shopify.com/s/files/1/0428/0408/4899/files/67145292643.pdf
    • https://cdn.shopify.com/s/files/1/0431/6738/3712/files/nexujuput.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nubizasijimowedemo.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/mimagesogisizasatilagif.pdf
    • https://cdn.shopify.com/s/files/1/0437/9344/9122/files/xuvapemidonazekale.pdf
    • https://cdn.shopify.com/s/files/1/0438/2064/6562/files/dunemej.pdf
    • https://cdn.shopify.com/s/files/1/0435/6866/0643/files/lezadavutevodimaxizukeda.pdf
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/tefokorotuduba.pdf
    • https://cdn.shopify.com/s/files/1/0434/0069/1866/files/zopodatepoforagusasela.pdf
    • https://cdn.shopify.com/s/files/1/0434/5567/6568/files/tupebat.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/tegofi.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_off0000694e.bin
d8c23749a0cc651a6f5623d7326757c674d4a69c3657206168597a7c2699b893		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694E 5084 bytes
font_01_sfnt_off00007a9f.bin
d61f325c6c661e62fb0691c1fe8c986da10f07d3535c61a001f123c6efab4528		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 14956 bytes

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