Malicious PDF — malware analysis report

Static analysis result for SHA-256 40b7d47b11bb3950…

MALICIOUS

PDF

52.2 KB Created: 2020-07-29 21:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 28ccdd5741a0fa84f11befe54a29b1df SHA-1: 3ebe7454f137a72f690d30f987d3d2003f870120 SHA-256: 40b7d47b11bb395068a190894bd9fa6955e66939f2887c0a6908007d0f27f4be
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. This indicates an attempt to redirect the user to a malicious site, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to the 'Singapore budget 2020 summary pdf'. The presence of a large number of embedded PDF links further supports the link farm heuristic, indicating a broad distribution attempt.

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=singapore+budget+2020+summary+pdf
    • http://files.servingjesuspoetry.com/uploads/1/3/0/8/130874224/b642de.pdf
    • http://files.houseofmaxwell.com/uploads/1/3/1/8/131857734/3112134.pdf
    • http://files.ionawhishaw.com/uploads/1/3/0/8/130815726/984c314b01a6.pdf
    • https://cdn.shopify.com/s/files/1/0431/8917/4432/files/gezibedupaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3591/files/27900049334.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8090/files/3319323152.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rumifagekesodurelakalon.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0434/0930/9848/files/53203446123.pdf
    • https://cdn.shopify.com/s/files/1/0432/1997/6350/files/71768480318.pdf
    • https://cdn.shopify.com/s/files/1/0433/3420/5590/files/93274630262.pdf
    • https://cdn.shopify.com/s/files/1/0434/7330/5750/files/29819964781.pdf
    • https://cdn.shopify.com/s/files/1/0430/2408/9242/files/12578759726.pdf
    • https://cdn.shopify.com/s/files/1/0435/8252/1503/files/xexovetuvugebakul.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/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007098.bin
2cb9aacb93ddb55e45f3620714c7e619d163a1809ef21ed16c2afbb2b415b5a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7098 5828 bytes
font_01_sfnt_off00008442.bin
f82dc05e07e7e7f61610ad36d5c04a8a412410e908e0f6d12baeca6215fbe087		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8442 13164 bytes
font_02_sfnt_off0000aeb5.bin
2366c32c20106fb0e25b2a362324d207b4dcb106ea9b41f1d2a4d7cbf7008cc0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAEB5 16232 bytes

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