Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cbe4d1b2dd4fbdb…

MALICIOUS

PDF

48.4 KB Created: 2020-08-13 21:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8714e4e3f11854c257a1edd17c1e731c SHA-1: 7fced6b779d439c78105c74bee221a86c8ca01d3 SHA-256: 0cbe4d1b2dd4fbdb461668cdbcc1371c3781aadc1e4774a675c33e90dde3fd88
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to Shopify domains, but one specific URL, 'https://ttraff.cc/pify?keyword=2d+cartoon+maker+software+free', is flagged as a malicious redirector. The document body, though heavily obfuscated, contains keywords related to the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness.

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.cc/pify?keyword=2d+cartoon+maker+software+free
    • http://files.rmtelnetworks.com/uploads/1/3/1/4/131482826/5314498.pdf
    • http://files.illinoisroute66.info/uploads/1/3/1/6/131637896/vefasivejenijak_gegaro.pdf
    • http://files.wrighteousbeagles.com/uploads/1/3/2/6/132695343/cc5cff0bed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/9932/4580/files/31889196991.pdf
    • https://cdn.shopify.com/s/files/1/0428/8456/3110/files/48766081901.pdf
    • https://cdn.shopify.com/s/files/1/0430/6511/4775/files/xevodosolawunusumewudav.pdf
    • https://cdn.shopify.com/s/files/1/0435/3176/3864/files/89472999267.pdf
    • https://cdn.shopify.com/s/files/1/0429/9731/7783/files/dekipubizanufejisez.pdf
    • https://cdn.shopify.com/s/files/1/0429/7929/5385/files/classifying_triangles_activity.pdf
    • https://cdn.shopify.com/s/files/1/0434/3637/6214/files/11514667446.pdf
    • https://cdn.shopify.com/s/files/1/0430/4994/3202/files/fibadelodegiwetitanorevo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1838/6588/files/66816016593.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gifizazuxapi.pdf
    • https://cdn.shopify.com/s/files/1/0431/6381/1997/files/towunoxu.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_off00007b98.bin
409c103ba77b1e450392d5ea1d6c6e2a68855a99bb9b8350043141b6890bef78
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B98 5328 bytes
font_01_sfnt_off00008da5.bin
0e0727e70e79b2ad11f60708193b7d849b6ba2a26036a3bf4d5cf4bac691f3aa
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DA5 11480 bytes