Malicious PDF — malware analysis report

Static analysis result for SHA-256 53119ab028fb5ec0…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 19:25:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4d02b20b73991cec84d2165e60ca389 SHA-1: 94fad61ccfc186d65c9a6f8cc2f013771a1b8b99 SHA-256: 53119ab028fb5ec0115b52b5ea7daa43380344dfe763859e686bb9311e218a7c
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a large number of benign-looking Shopify URLs, suggesting a link farm for SEO poisoning or to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed to lure users to a harmful site.

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=ahmet+%25C3%25BCmit+sis+ve+gece+pdf
    • http://lukewule.appalachianrangeoutdoors.com/uploads/1/3/1/4/131453872/sofuxaxukudibe-nisinalivawugi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5307/2022/files/36454254691.pdf
    • https://cdn.shopify.com/s/files/1/0432/2174/5823/files/dodifapanewezifu.pdf
    • https://cdn.shopify.com/s/files/1/0428/5136/9127/files/57923951551.pdf
    • https://cdn.shopify.com/s/files/1/0433/9603/8812/files/34305777070.pdf
    • https://cdn.shopify.com/s/files/1/0433/1926/3397/files/funowobuteb.pdf
    • https://cdn.shopify.com/s/files/1/0430/8166/2628/files/92783908916.pdf
    • https://cdn.shopify.com/s/files/1/0428/9072/3487/files/xekitekigugerijiparitifuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/96053468706.pdf
    • https://cdn.shopify.com/s/files/1/0431/3081/4626/files/duresefixesenagewarada.pdf
    • https://cdn.shopify.com/s/files/1/0447/4866/9079/files/58926306497.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zugazad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5865/8454/files/farew.pdf
    • https://cdn.shopify.com/s/files/1/0437/0549/9803/files/96853974681.pdf
    • https://cdn.shopify.com/s/files/1/0429/5095/1066/files/kovezodadetafu.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_off00006274.bin
2766ec7bc612c089c2504d19239cf7a2c49f418e81c72b356037571d490246a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x6274 5400 bytes
font_01_sfnt_off00007493.bin
17dc7392d8255131776de49f3b957f9c4f0a18a22dd03367b279195ec5fc9576
pdf-font-stream PDF embedded font (sfnt) at offset 0x7493 12024 bytes