Malicious PDF — malware analysis report

Static analysis result for SHA-256 15dab4ea9a1cb246…

MALICIOUS

PDF

34.2 KB Created: 2020-08-06 18:47:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2397838d7ccae4129f7bf6218cd5e9af SHA-1: 78923917d7ab3b08162d3c37a0def99d15bfe490 SHA-256: 15dab4ea9a1cb246023b1c76d1038f812ed5167118d7407133c499f6bf1d5fea
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which are hosted on Shopify. The document body, though heavily obfuscated, contains the same URL found in the redirector heuristic, suggesting an attempt to trick users into clicking malicious links. No scripts were extracted, but the presence of malicious links indicates a likely phishing or malware 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.com/pify?keyword=automation+step+by+step+pdf
    • http://files.laisaycheese.com/uploads/1/3/0/7/130775062/8494142.pdf
    • http://fatavo.electroreview.info/uploads/1/3/1/0/131070450/3000584.pdf
    • http://files.covoc.ie/uploads/1/3/0/8/130874416/gowikuzim.pdf
    • http://files.jaynardiscounts.com/uploads/1/3/1/8/131856212/zijip-rusef-xutinu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zupapinited.pdf
    • https://cdn.shopify.com/s/files/1/0429/1005/6615/files/96146631817.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/vumuwegote.pdf
    • https://cdn.shopify.com/s/files/1/0428/4963/2415/files/bowexudazasunuza.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pekazojifedabefotekufof.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7118/files/midoboxemudimirifo.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5469/files/64631330154.pdf
    • https://cdn.shopify.com/s/files/1/0434/9476/8792/files/mupulu.pdf
    • https://cdn.shopify.com/s/files/1/0436/1083/3058/files/24354594015.pdf
    • https://cdn.shopify.com/s/files/1/0433/0507/4838/files/99198328916.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_off000048a5.bin
b2f4645cb213a1a4f0ee4320f1863f037c25d65cbde3b5d3cfc0826c51e7b7b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x48A5 5292 bytes
font_01_sfnt_off00005a97.bin
2de05f418b29852e0001ef8b823fcaab0f0a7a71775243489da82d5b75c5d5a6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A97 9776 bytes