Malicious PDF — malware analysis report

Static analysis result for SHA-256 d755b14f347b451c…

MALICIOUS

PDF

42.5 KB Created: 2020-08-11 14:45:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2b7c7b66ee38eebb0fa4d5c7e69ace5a SHA-1: 6e1641c83299e660d793f359588d3eda65c35167 SHA-256: d755b14f347b451c48b808fecd8f13467a44d491d8963ae79fc89302a9d4ab9b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the redirector. This suggests the primary goal is to redirect the user to malicious content, likely for phishing or malware distribution.

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=charles+baudelaire+albatros+pdf
    • http://files.djconsuelo.com/uploads/1/3/2/6/132695339/fevaxopesinusane.pdf
    • http://lovixub.tattooaftercareguide.com/uploads/1/3/0/9/130968984/a7672ffe.pdf
    • http://medazer.mirelesice.com/uploads/1/3/1/3/131380600/e5995cacb3f7a.pdf
    • http://files.bestofthewestmoving.com/uploads/1/3/0/7/130776864/1905575.pdf
    • http://files.mywaterfrontteam.com/uploads/1/3/2/7/132711954/gogekepori.pdf
    • https://cdn.shopify.com/s/files/1/0432/9085/3541/files/83121759899.pdf
    • https://cdn.shopify.com/s/files/1/0440/4995/7029/files/44238867033.pdf
    • https://cdn.shopify.com/s/files/1/0438/1271/6701/files/mirolojobudurajuzobezis.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42386580717.pdf
    • https://cdn.shopify.com/s/files/1/0432/5185/9616/files/gegejarobogijalejawol.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9217/files/24519337614.pdf
    • https://cdn.shopify.com/s/files/1/0434/7248/6566/files/lexijoti.pdf
    • https://cdn.shopify.com/s/files/1/0445/6742/9279/files/gotevopasarekaduk.pdf
    • https://cdn.shopify.com/s/files/1/0437/8984/4641/files/pujulexefad.pdf
    • https://cdn.shopify.com/s/files/1/0437/9050/0001/files/espon_stylus_cx7400.pdf
    • https://cdn.shopify.com/s/files/1/0427/7446/2631/files/83404554647.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_off000068b4.bin
8af754c5ce2d3af8eaabe1dadcc7f0fcd016c620b6273a513000cee8cf18bdd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x68B4 5176 bytes
font_01_sfnt_off00007a36.bin
7860098e80ecc1dd142c9e04d7f98a98e07f5ca513babea0e3bf03df33cc8d40
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 10240 bytes