Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3f84e724e78aab…

MALICIOUS

PDF

41.7 KB Created: 2020-07-07 12:14:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5fb674630bdfb66f7d6f0a49090da341 SHA-1: 636f163c31d667640d4a91c5572cc8fecfa2d14b SHA-256: 0e3f84e724e78aabb2b4deabcae7a1c961f35422d461b3ba3594f712a8482e08
154 Risk Score

Malware Insights

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

The PDF document is designed as a lure, masquerading as an architect portfolio template to entice users to click on embedded links. These links lead to a link farm hosting numerous other PDF files, ultimately redirecting to malicious infrastructure. The ML classifier strongly indicates malicious intent, and the presence of a redirector link confirms the attempt to lead users to harmful content.

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/wb?keyword=architect%20portfolio%20template%20pdf#architect+portfolio+template+pdf
    • http://files.skincarebyadrianag.com/uploads/1/3/0/7/130775827/6a94d7.pdf
    • http://files.poleshiftnews.com/uploads/1/3/2/8/132815961/493882.pdf
    • http://files.iluvmemore.com/uploads/1/3/2/3/132302815/ea158.pdf
    • http://files.williammonaguenativeart.com/uploads/1/3/0/7/130739747/vunidegote.pdf
    • http://files.hallielee.com/uploads/1/3/2/8/132815961/5788720.pdf
    • http://files.orangehistory.org/uploads/1/3/1/3/131380998/6a7d3c8e67aa6.pdf
    • http://files.dlfinancial.org/uploads/1/3/1/3/131379749/tobij.pdf
    • http://files.killjoy.info/uploads/1/3/2/8/132816158/444fa6d86d0810f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://kofimefek.files.wordpress.com/2020/06/97887574771.pdf
    • https://nosuvul.files.wordpress.com/2020/06/wimubo.pdf
    • https://pezufonitibi.files.wordpress.com/2020/07/81047254513.pdf
    • https://duxijepur.files.wordpress.com/2020/06/bobedalotimasigafa.pdf
    • https://xipunibeneta.files.wordpress.com/2020/06/94424715301.pdf
    • https://dekosim.files.wordpress.com/2020/07/46665915014.pdf
    • https://dizujased.files.wordpress.com/2020/07/mobuvufupipukax.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_off0000680b.bin
a127c6e31e35d11bde28da20defbfcf52bccdca87eb391386732648cd6d3a118
pdf-font-stream PDF embedded font (sfnt) at offset 0x680B 4888 bytes
font_01_sfnt_off0000789d.bin
fa05b2d28e26c8cddae1d6b5bf52e7f6f69a362902c3430d2b98534113f6a377
pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 9868 bytes