Malicious PDF — malware analysis report

Static analysis result for SHA-256 6abfa4c70aa394a8…

MALICIOUS

PDF

47.6 KB Created: 2020-08-25 18:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4a9f37aeaece7b1fdbeae0b6a298c12 SHA-1: 12bbcb76662acc5a31d136d1e1721ccbfcb8909f SHA-256: 6abfa4c70aa394a82e1f4ccb250584e0d22e0d8419bb85833759052c128269de
154 Risk Score

Malware Insights

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

The PDF contains embedded links that lead to known malicious redirector infrastructure, specifically a URL designed to appear as a project plan template download. The ML classifier strongly indicated maliciousness, and the PDF structure suggests it's part of a link farm designed to distribute malicious content. No scripts were extracted, but the primary attack vector is the malicious link.

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=project+plan+template+xls
    • http://files.divascentz.com/uploads/1/3/0/7/130739615/zevomegaw.pdf
    • http://files.onepointeded.com/uploads/1/3/1/6/131606289/karawi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/8660/1635/files/encyclopedia_of_general_science_for_general_competitions_download.pdf
    • https://cdn.shopify.com/s/files/1/0434/7238/8249/files/48234841242.pdf
    • https://cdn.shopify.com/s/files/1/0428/0621/4819/files/37067948827.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31670740491.pdf
    • https://cdn.shopify.com/s/files/1/0440/7682/6789/files/dibisob.pdf
    • https://cdn.shopify.com/s/files/1/0436/9491/5738/files/89927428760.pdf
    • https://cdn.shopify.com/s/files/1/0434/3929/2577/files/famuvozavozoxuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/6619/5106/files/lodolutivimuxuduzesid.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6849/files/14108954254.pdf
    • https://cdn.shopify.com/s/files/1/0433/6962/7799/files/kuxuzidujij.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_off00007d1f.bin
852a689362bf619017f3ef2935dd75c4b47868b21877d2c738ae5238449f7f88
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D1F 5224 bytes
font_01_sfnt_off00008ed0.bin
7e58f873e97e6901b789e2660b255125609e6a3118dbd083769b36505fc0d478
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED0 10256 bytes